OPINION
I. INTRODUCTION
To what extent may Alaska charge nonresident commercial fishermen higher license and permit fees than it charges residents? In order to comply with the Privileges and Immunities Clause of the United States Constitution, the differential between individual resident and nonresident permit fees must be substantially equal—but need not be precisely equal—to the contribution of each Alaska resident to fisheries management. Because in ordering the state to pay refunds to nonresidents who paid more than their fair contribution to Alaska’s fisheries budget the superior court held the state to a standard of precise, rather than substantial, equality, we vacate the portion of the superior court’s order pertaining to refunds and remand the case to the superior court to determine the legitimate variation between actual nonresident fee differentials and those calculated to reflect nonresidents’ fair burden of fisheries management costs.
II. FACTS AND PROCEEDINGS
This is the fourth time this case has been before us. In 1984 appellees sued the state and the Commercial Fisheries Entry Commission (CFEC) on behalf of all nonresident Alaska commercial fishermen. (The class includes “all persons who participated in one or more Alaska commercial fisheries at any time who paid non-resident assessments to the State for commercial or gear licenses or permits.”
In Carlson I,
In Carlson II we determined the permissible differential between fees paid by residents and nonresidents under the Privileges and Immunities Clause.
On remand from Carlson III, the superior court directed the state to calculate the annual permissible differential from 1984 to 2002. But the parties disputed the accounting method for historical nonresident fees. The state moved for summary judgment, arguing that nonresident fees should be averaged across permit and license types to yield a “collective” class differential; the class cross-moved for summary judgment, arguing that each class member’s historical fee should be treated individually. The superior court adopted the class’s individual accounting method and ordered the state to pay refunds to nonresident commercial fishermen who paid cumulatively more than the permissible differential. The state appeals.
III. STANDARD OF REVIEW
We review an award of damages for abuse of discretion and independently review the law applied by the superior court.
IV. DISCUSSION
A. Carlson II and III Require Individual Accounting of Nonresident Fees.
The state first argues that the formula for complying with the Privileges and Immunities Clause has not been completely determined, and therefore, that it is entitled to argue for collective accounting of nonresident fees. We reject this argument.
Our previous Carlson decisions make clear that nonresident fees should be compared individually to the permissible differential. For instance, when we calculated the individual Alaska resident’s annual contribution to the fisheries budget in Carlson II, we anticipated that an individual accounting of nonresident fees would determine the state’s liability: “[I]n 1982 the difference between a resident and nonresident permit could not substantially exceed $48.14, while in 1986 the difference could not substantially exceed $59.34.”
The formula [derived in Carlson II ] calculates the per capita resident contribution to the cost of fisheries management, regardless of whether this person is a fisher.... The figure determined by this formula for any given year is then compared to the actual fee differential charged. If the fee differential paid by the nonresident commercial fishers, i.e., the nonresident fee minus the resident fee for the same access, exceeds the resident contribution as calculated by the formula, then “the State will have failed to demonstrate that the means employed by its statute have a substantial enough relationship to the legitimate interest of the statute to survive Privileges and Immunities Clause review.”[22 ]
By comparing nonresident and resident fees “for the same access,” we clearly indicated that the relevant comparisons are between individual permit holders. The various permits grant access to different fisheries, whose profitability, permit prices, and hence permit fees, vary widely.
In light of our previous holdings in this case, we decline to consider the state’s arguments that the fees paid by nonresidents should be averaged for comparison to the per capita resident contribution to fisheries management. In advancing this argument, the state is attempting to resuscitate an issue previously decided. Furthermore, if the state were allowed to balance its books retrospectively by averaging the nonresident differential across fee classes, this would not necessarily bring the 3:1 scheme into compliance with the Privileges and Immunities Clause. Under the state’s proffered averaging method, nonresident permit holders in higher fee classes would in effect pay the differential due from nonresidents in lower fee classes, but similarly situated resident permit holders would bear no such burden.
B. The Superior Court Correctly Determined that the State Violated the Privileges and Immunities Clause.
The state next argues that the “constitutional issue” (i.e., its liability) has not yet been determined, because the superior court did not explicitly rule that nonresident fees substantially exceed resident fees. The state here makes two related arguments: First, it implies that there has been no ruling yet on its liability. Second, it argues that it is impossible to infer the superior court’s reasoning supporting its judgment that the state violated the Privileges and Immunities Clause. We reject both arguments.
1. Liability vs. damages
In the context of this case, the state’s distinction between liability and damages is artificial. In three previous decisions, as noted above, we have clearly established that nonresident fees should be compared to resident fees plus the permissible differential on an individualized basis. It is past the time that the state may argue for a collective
2. Sufficiency of the superior court’s findings
According to the state, “[n]othing in the record provides a sufficiently clear rationale supporting the conclusion that the nonresident fees lack a reasonable relationship to the allowable differentials, regardless of whether the allowable differentials are applied individually or collectively to the class.” We disagree.
In Alaska Wildlife Alliance v. State
Applying these standards to the present ease, we conclude that the superior court found the state liable to those class members who paid more than the permissible differential. As indicated above, we have already determined in our earlier decisions in this case that nonresident fees should be compared individually rather than collectively to resident fees plus the permissible differential. The superior court applied this rule when it denied the state’s motion for summary judgment and granted the class’s cross-motion. In its order, which attempts to implement our earlier Carlson decisions and to enforce the stipulation between the parties,
*143 Beginning with the 2005 licensing year, and for the foreseeable future, the annual nonresident [fee] will be calculated as follows: Once every three years, the Commercial Fisheries Entry Commission ... will calculate an average of the annual differentials for the five most recent fiscal years for which the Office of Management and Budget ... has provided the Commission with differentials. The Commission will round the calculated average to the nearest five dollars. This rounded average will be the differential that the Commission will impose on a nonresident permit holder for each of the next three years. It will also be the differential that the Alaska Department of Fish and Game will impose on a nonresident crew-member license holder for each of the next three years.
1. The discriminatory measure must be rationally related to a valid purpose.
The Supreme Court has held that states should be granted considerable leeway in enacting taxes.
In resolving constitutional challenges to state tax measures this Court has made it clear that “in taxation, even more than in other fields, legislatures possess the greatest freedom in classification.” Our review of tax classifications has generally been concomitantly narrow, therefore, to fit the broad discretion vested in the state legislatures. When a tax measure is challenged as an undue burden on an activity granted special constitutional recognition, however, the appropriate degree of inquiry is that necessary to protect the competing constitutional value from erosion.
.... The Privileges and Immunities Clause, by making noncitizenship or non-residence an improper basis for locating a special burden, implicates not only the individual’s right to nondiscriminatory treatment but also, perhaps more so, the structural balance essential to the concept of federalism. Since nonresidents are not represented in the taxing State’s legislative halls ... judicial acquiescence in taxation schemes that burden them particularly would remit them to such redress as they could secure through their own State; but “to prevent (retaliation) was one of the chief ends sought to be accomplished by the adoption of the Constitution.” Our prior cases, therefore, reflect an appropriately heightened concern for the integrity of the Privileges and Immunities Clause by erecting a standard of review substantially more rigorous than that applied to state tax distinctions among, say, forms of business organizations or different trades and professions[33 ]
As we have stated previously in Carlson I and Carlson II, the state may charge nonresidents more than residents in order to equalize the burden of fisheries management between them.
In examining the challenged statutory scheme, we may consider the availability of less restrictive means to achieve the state’s valid objective.
2. The 3:1 fee scheme is not rationally related to the goal of equalizing the burden of fisheries management between nonresidents and residents.
In Carlson III we stated: “The record must support the belief that a rational relationship exists between the [actual nonresident] fee differential and the average cost of fisheries management to the resident.”
The Supreme Court has indicated that an arbitrary taxing scheme may implicate the Privileges and Immunities Clause even if it should accidentally have no more than a de minimis effect in a given year. For instance, in Lunding v. New York Tax Appeals Tribunal, the challenged New York tax law denied nonresident taxpayers a state income tax deduction for alimony payments.
D. Incidental Inequality Is Permissible Within a Rational Scheme.
Where a tax or fee that differentiates between residents and nonresidents is rationally related to a valid state purpose, mere inequality in a given year will not necessarily implicate the Privileges and Immunities Clause. In Travelers’ Insurance Co. v. Connecticut,
This is clearly the case with the prospective method of calculating the permissible differential to which the parties agreed and which the superior court approved. Under this scheme, the state determines the permissible differential to be charged nonresidents over the next three years by averaging the resident contribution to fisheries management over the previous five years. Under this scheme, the nonresident differential is directly related to the fisheries budget, although exact equality is not guaranteed. Since the state is not required to guarantee precise equality prospectively, we conclude that it should not be required to provide it retrospectively, either. We see no reason why the superior court may not apply a rational retrospective scheme, similar to that stipulated by the parties going forward in their February 2001 stipulation, in order to determine the legitimate variation between actual nonresident fees and permissible nonresident fees and the amount of any refunds. The problem is to determine the extent to which fee differentials may depart from perfect equality and still pass constitutional muster.
In such cases the Supreme Court has held that in order to show that a formula is unconstitutional, “the taxpayer [must prove] by ‘clear and cogent evidence’ that the income attributed to the State” (analogous in this case to the permissible nonresident fees), is “out of all appropriate proportion to the business transacted”
These cases demonstrate that the search for precision is illusory and that there are constitutionally acceptable variations from mathematical equality in the structuring of tax regimes. The same is true for the structuring of resident and nonresident fishing fees. From this case law, we conclude that an allowable margin of error may be found in the range up to fifty percent.
Because the superior court required precise equality between the burdens shouldered by residents and nonresidents, we vacate the superior court’s order pertaining to calculation of refunds. We remand for the superior court to determine whether any inequality between residents and nonresidents was incidental—and therefore constitutionally tolerable—or substantial'—and thus unconstitutional.
V. CONCLUSION
When historical commercial fishing fee differentials are compared to permissible differentials, it is apparent that the 3:1 fee schedule is not rationally related to the state’s goal of equalizing the burden of fisheries management between nonresidents and residents. A fee scheme substantially related to the state’s goal will guarantee substantial, rather than precise, equality. Because the state should be held to this standard retrospectively as well as prospectively, we VACATE the portion of the superior court’s order requiring the state to pay refunds based on strict equality and REMAND the case for further proceedings consistent with this opinion.
Notes
. Carlson v. State, Commercial Fisheries Entry Comm’n,
. From 1977 to 2001 AS 16.43.160(b) stated:
Annual fees established under this section shall be no less than $10 and no more than $750 and shall reasonably reflect the different rates of economic return for different fisheries. The amount of an annual fee for a nonresident shall be three times the amount of the annual fee for a resident.
(Emphasis added.)
The legislature repealed this section in 2Q01 and added a new section on nonresident fees. Ch. 27, §§ 5, 7, SLA 2001. Effective 2002, nonresident fees were covered by AS 16.43.160(e):
For an entry permit or an interim-use permit issued for calendar year 2002 and following years, the annual base fee may not be less than $10 or more than $300. The annual base fee must reasonably reflect the different rates of economic return for different fisheries. The fee for a nonresident entry permit or a nonresident interim-use permit shall be higher than the annual base fee by an amount, established by the commission by regulation, that is as close as is practicable to the maximum allowed by law. The amount of the fee for a nonresident entry permit or a nonresident interim-use permit may reflect [various costs associated with fisheries management].
Ch. 27, § 5, SLA 2001 (emphasis added).
In 2005 the statute was amended to provide: In addition to the annual base fee established by the commission under this subsection, a nonresident shall pay an annual nonresident*140 surcharge for the issuance or renewal of one or more entry permits or interim-use permits. The annual nonresident surcharge shall be established by the commission by regulation at an amount that is as close as is practicable to the maximum allowed by law.
AS 16.43.160(c) (Temporary and Special Acts and Resolves 2005); Ch. 16, § 3, SLA 2005.
.
. All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside. No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws. U.S. Const, amend. XIV, § 1 (emphasis added).
. Carlson I,
. Id. at 1274 (citing Toomer v. Witsell,
. Id. at 1278.
. Id.
. Id. (quoting Taylor v. Conta,
. U.S. Const, art. I, § 8, cl. 3.
. See Carlson v. State, Commercial Fisheries Entry Comm’n,
. Id. at 1343. We also upheld the superior court's conclusion that the fee schedule did not violate the Commerce Clause. Id. at 1340-41.
. Id. at 1343. After Carlson II, the legislature amended the permit schedule to reflect our decisions in Carlson I and Carlson II.; see note 2 supra.
. Id. at 1344-45.
. State, Commercial Fisheries Entry Comm’n v. Carlson,
. Id. at 865-66, 867-68.
. Id. at 866-67.
. Id. at 864.
. Breck v. Moore,
. Carlson III,
. Carlson II,
(1) the resident annual fee for the issuance or renewal of an entry permit or interim-use permit in a limited fishery is .25 percent of the estimated value of the entry permit, rounded to the nearest fee class amount ... the non-resident annual fee is three times this amount.... (2) the resident annual fee for the issuance or renewal of an interim-use permit in an unlimited fishery is .25 percent of the estimated average gross earnings per permit in the most recent three years for which data are available, rounded to the nearest fee class amount ... the non-resident fee is three times this amount....
[[Image here]]
(4) the resident and non-resident annual fees are:
FEE CLASS ANNUAL FEE
Resident Non-Resident
I $250 $750
II 200 600
*142 H 150 450
< 100 300
< 50 150
. Carlson III,
. See note 43 infra.
. Carlson III,
. We note that disparity of treatment based on fee class, applying equally to residents and nonresidents, does not implicate the Privileges and Immunities Clause. Any challenge to this sort of disparity would likely fail, given the legislature’s broad taxing power and the considerably more lenient standards of review under the Equal Protection and Due Process Clauses; see, e.g., Baldwin v. Fish & Game Comm'n of Montana,
.
. Id. at 205-07 (superior court may be affirmed if grounds for ruling “discernible sufficiently from the record to permit appellate review").
. Id. at 206.
. The parties had previously agreed on the method for determining fees in the future, which the superior court included in the same order:
.According to the February 12, 2001 Stipulation and Order:
The refunds will incorporate a setoff for fee and license underpayments on an individual basis. That is, if the permissible differential exceeds the actual differential for a permit held by an individual, the difference will be deducted from the cumulative overpayments that are due that individual. Underpayments will include interest at the same rate as over-payments. If a member has cumulative underpayments that exceed the member’s cumulative overpayments, the State will not assess or attempt to collect the difference from the member.
. Lunding v. New York Tax Appeals Tribunal,
.
. Id. at 661-63,
. Carlson I,
. Supreme Court of New Hampshire v. Piper,
. Carlson II,
. Id.
. Id. at 1344.
. Carlson III,
. Travelers’ Ins. Co. v. Connecticut,
. Lunding v. New York Tax Appeals Tribunal,
. Carlson III,
. In Carlson II we noted the large profit variation between various fisheries and within the same fishery from year to year:
The profitability of the different fisheries, and hence the value of permits, varies dramatically. For example, the average gross earnings per permit for the Chignik salmon seine fishery ranged from $88,709 to $265,525 for the years 1983 through 1993. The permit fee for this fishery is $250 for residents and $750 for nonresidents. During the same time period the average gross earnings per permit for the Bristol Bay herring spawn on kelp fishery ranged from $847 to $1613. The permit fee for this fishery is $50 for residents and $150 for nonresidents.
.
. Id. at 293,
. Id. at 313,
. Id. at 313-14,
. "Nor, we may add, can the constitutionality of one State’s statutes affecting nonresidents depend upon the present configuration of the statutes of another State.” Id. at 314,
. Under the Supreme Court's comparatively stricter Commerce Clause jurisprudence, a tax which facially discriminates against interstate commerce is almost per se a violation of the Commerce Clause, regardless of the degree of discrimination. Fulton Corp. v. Faulkner,
.
. Travelers' Ins. Co.,
. See id. at 371,
.
. Moorman Mfg. Co. v. Bair,
. Id. (quoting Norfolk & W. Ry. v. Missouri State Tax Comm'n,
.
. A leading treatise on taxation has noted that "bare percentages without explanation are not helpful to a determination of the issues at hand.” 1 Jerome R. Hellerstein & Walter Hellerstein, State Taxation ¶ 8.15 (3d ed.1998) (quoting Citizens Utils. Co. v. Department of Revenue,
In this opinion we have cited only to cases that use the methodology we believe to be correct.
.
.
.
. See, e.g., Unisys Corp. v. Pennsylvania.,
. Even though greater margins of error have been upheld in some of the taxation allocation cases discussed above, the constitutional analysis is not resolved by mere reference to a universally applicable maximum margin of error. While we do not require mathematical precision, an acceptable margin of error should be based on the accuracy that is reasonably attainable in individual cases. In this case, the state seems capable of relatively greater accuracy in its measurements than in many of the tax allocation cases cited above. Importantly, the state possesses much of the data relevant to assessing the extra costs associated with non-resident commercial fishing licenses. Bearing in mind that the state should set the added cost associated with a nonresident commercial fishing license fee at a rate that is substantially equal to the amount that residents pay (and non-residents do not pay) in support of Alaska’s fisheries, we recognize nonetheless that there is no single correct method of allocation and that uncertainties exist with respect to any formula. We therefore accord the state considerable leeway in its calculations. The fifty percent margin of error is intended to reflect this leeway.
. The class argues that the years 2003 and 2004 merit refunds as well, since the parties agreed that each nonresident would pay only one differential, regardless of how many permits that nonresident held, but, they allege, the CFEC did not adopt this "one differential per person” approach until 2005. The superior court should determine this factual question on remand.
