OPINION
At issue in this appeal is the constitutionality of a 1992 amendment to the permanent fund dividend (PFD) • statutes, Chapter 4, *324 section 4, SLA 1992. The amendment changed the qualifying date set forth in AS 43.23.005(a) for a 1993 PFD. Charles E. Underwood, Jr., along with his wife and son, Susie G. Underwood and Anthony C. Underwood (the Underwoods), allege that they were unlawfully denied 1993 PFDs as a result of the change. They instituted this action against the State of Alaska, Governor Walter J. Hickel and the Department of Revenue (collectively “the State”), claiming that the amendment violated a number of their constitutional rights and that the State was estopped from denying their dividend applications. The superior court granted summary judgment in favor of the State. We affirm.
I. FACTS AND PROCEEDINGS
The facts are not in dispute. The Under-woods timed their move from Texas to Alaska with the specific intention of becoming Alaska residents in time to qualify for a 1993 PFD. According to Charles Underwood, he understood that in order to qualify for the 1993 PFD, the family members had to be state residents on or before April 1, 1992. Although Charles otherwise would have preferred to remain at his job in Texas until May 1992, he resigned in March. Had Charles remained at his job until late May as he desired, Charles claims he would have earned roughly another $3,000 in after tax wages. The family arrived in Alaska on March 25, 1992.
On March 31, 1992, Governor Hickel signed Chapter 4, section 4, SLA 1992, which amended AS 43.23.005 by changing the eligibility requirements for a PFD to coincide with the calendar year. As a result, to be eligible for a 1993 PFD, applicants had to show Alaska residency as of January 1,1992. Accordingly, persons who established Alaskan residency between January 2, 1992 and April 1, 1992 were not eligible for a 1993 PFD, whereas under prior law they would have been eligible.
The Underwoods brought suit in superior court challenging the constitutionality of the enactment. They specifically claimed that it violated the equal protection and due process guarantees of the federal and state constitutions, that it constituted an ex post facto law, that it was an impermissible taking of property, and that the State was equitably es-topped from amending the law.
The superior court granted summary judgment in favor of the State on all of the Underwoods’ claims. The Underwoods appeal.
II. DISCUSSION
The parties agree that there are no issues of material fact, and that this case may be properly resolved as a matter of law. The constitutional and other purely legal questions at bar are issues to which this court will apply its independent judgment.
State v. Anthony,
A. The Challenged Enactment Does Not Violate The Underwoods’ Constitutional Rights.
Alaska Statute 43.23.005 governs the eligibility requirements for a PFD. Following the enactment of Chapter 4, section 4, SLA 1992, the statute provided that:
(a) An individual is eligible to receive one permanent fund dividend each year in an amount to be determined under AS 43.23.025 if
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(3) the individual was a state resident for at' least the calendar year immediately preceding January 1 of the current dividend year; ....
AS 43.23.005(a)(3) (emphasis added). Prior to the 1992 amendment, the statute required Alaska residency for the twelve month period immediately preceding April 1 of the current dividend year. AS 43.23.005(a)(2) (effective June 11, 1991).
1. Equal Protection
The Underwoods assert that the 1992 enactment denied them equal protection and opportunity under both the Federal and Alaska Constitutions.
See
U.S. Const, amend. XIV; Alaska Const, art. I, § 1. Because Alaska’s equal protection clause “is more protective of individual rights than the
*325
federal equal protection clause,”
State v. Anthony,
We have adopted a sliding scale approach to equal protection questions.
State v. Erickson,
We have held that an individual’s interest in a PFD “is merely an economic interest and therefore is entitled only to minimum protection under our equal protection analysis.”
Anthony,
The State asserts that the purpose of the challenged legislation was to improve the overall efficiency of the PFD program. By moving the qualifying date to coincide with the calendar year, the PFD division of the Department of Revenue gains three months to process applications. This additional time should result in earlier detection of ineligible applicants and fewer improperly paid PFDs, less need for temporary staff to process applications, and quicker resolution of questioned applications, thereby decreasing the number of delayed payments. The State also asserts that the amendment was intended to simplify the PFD program, thereby decreasing public confusion and minimizing the many date-related errors that result in missed dividends.
These objectives are legitimate ones, and we reject the Underwoods’ argument to the contrary. The Underwoods contend that the cited objectives are not legitimate because they are based on cost savings and efficiency.
See Herrick’s Aero-Auto-Aqua Repair Serv. v. State, Dep’t of Transp.,
The means-to-ends tailoring of the amendment also satisfies the “fair and substantial relation” test. In arguing to the contrary, the Underwoods largely look to the fact that the State extended the application period for *326 1993 PFDs through June 1992. 3 Their argument is that, because the application period for 1993 PFDs was extended, the legislature also could and should have extended the eligibility period for 1993 PFDs.
However, the extended application period was specifically intended to reduce public confusion resulting from the 1992 statutory amendments, and it is substantially related to the purpose of the legislation. Moreover, the fact that the application time was extended says little about the claims at issue in this ease. The State does not assert that it .rejected the Underwoods’ applications because of the additional burden in processing them. The issue is merely whether the changed qualifying date is fairly and substantially related to the goals of the 1992 amendments. Certainly, the State could have elected to permit applicants to achieve the one year residency requirement any time during the extended 1993 application period, thereby resulting in acceptance of the Underwoods’ applications. However, the State’s decision not to extend the qualifying date along with the application deadline does not mean that the enactment fails to satisfy the fair and substantial relation test. To the contrary, viewing the goals and means of the challenged legislation, we conclude that the State was not constitutionally required to extend the eligibility period for 1993 PFDs simply because it was feasible to do so.
The Underwoods next rely on
Isakson v. Rickey,
The statute at issue in Isakson cannot be logically compared to the challenged amendment in this case. Unlike the extremely loose tailoring in Isakson, the action moving the qualifying date for 1993 PFDs by three months is fairly and substantially related to the purpose of simplifying the PFD program in order to decrease public confusion and to improve efficiency and accuracy in administering the program. There is no significant danger of over or underinclusiveness as a result of the State’s action.
Because the challenged amendment derives from a legitimate governmental objective, and the means bear a fair and substantial relation to that objective, the 1992 amendment to AS 43.23.005(a) survives minimal scrutiny under Alaska’s Constitution. Accordingly, the Underwoods’ equal protection claim fails.
2. Due Process
The Underwoods next assert that the enactment violated their due process rights because upon their arrival in Alaska in March 1992, they had a vested right to 1993 PFDs, subject only to their continuing residence. 4 We disagree.
*327
As of March 31,1992, the Underwoods had been Alaska residents for approximately six days, far short of the twelve month requirement of AS 48.23.005 as it existed when the Underwoods arrived. At that time, the Un-derwoods possessed nothing more than an inchoate expectancy of a 1993 PFD that is not afforded constitutional protection.
See Norton v. Alcoholic Beverage Control Bd.,
The Underwoods cite to real property cases from other jurisdictions to support their claim that their reliance on AS 43.23.-005 at the time of their move to Alaska should give them a vested right in the law as it existed on the date of their move. The Underwoods’ analogy between real property transactions and the present case is unpersuasive. Unlike real property situations in which the complaining party indisputably possesses property rights in specific land, the Underwoods had no property right whatsoever in a 1993 PFD. 5 Accordingly, there is no due process violation in this ease.
3. Ex Post Facto Law
The Underwoods next assert that the 1992 amendment constitutes an ex post facto law in violation of the Alaska Constitution.
6
An ex post facto law is a law “ ‘passed after the occurrence of a fact or commission of an act, which retrospectively changes the legal consequences or relations of such fact or deed.’ ”
Danks v. State,
In determining whether a statute affecting pre-enactment conduct is unconstitutionally retrospective, one inquiry is into whether the statute affects vested rights.
See Norton,
The Underwoods alternatively urge us to reject a vested rights inquiry and instead review the challenged enactment for fairness and reasonableness.
See Norton,
The effective date of the 1992 amendment to AS 43.23.005 was January 1, 1993. The amendment made state residency during calendar year 1992 relevant to eligibility for a 1993 PFD, thereby bearing some relation to events dating back to January 1, 1992, instead of April 1,1992 as under the prior law.
*328
We are satisfied that this change did not unfairly or unreasonably impinge upon any property rights or settled expectations. Thus, we find that the amendment does not violate the constitutional prohibition against retroactive legislation. The Underwoods’ claim on this ground therefore fails.
See, e.g., ARCO Alaska, Inc. v. State,
B. The State Is Not Equitably Estopped From Denying the Underwoods Their 1993 PFDs.
The Underwoods lastly claim that the State should be estopped from enforcing the 1992 amendment as to them because they acted in detrimental reliance on the prior law. We reject this claim. In short, the' Underwoods undertook a calculated risk when they decided to move to Alaska in March rather than May of 1992. The State engaged in no conduct encouraging this action, or in any way guaranteeing that the Underwoods would qualify for a 1993 PFD if they arrived in March. Thus, while it is unfortunate that the Underwoods’ calculated risk did not pay off, the State is not obligated to pay for any losses incurred by the Under-woods as a result of their decision to move to Alaska in March.
III. CONCLUSION
The State’s amendment to the eligibility statute for 1993 PFDs did not violate the Underwoods’ constitutional rights. Nor is the State equitably estopped from denying the Underwoods a 1993 dividend. Accordingly, the superior court’s order granting summary judgment in favor of the State is AFFIRMED.
Notes
. Article I, section 1 of the Alaska Constitution states, "[t]his constitution is dedicated to the principle[ ] that ... all persons are equal and entitled to equal rights, opportunities, and protection under the law....” Although the parties do not specifically address the issue, the class allegedly subject to disparate treatment under the amendment includes all persons who would have been eligible for a 1993 PFD but for the three month change in the qualifying date.
. Although the Underwoods acknowledge that the rational basis test ordinarily applies to a person's interest in a PFD, they assert that the 1992 enactment interferes with their right to travel, thereby implicating strict scrutiny analysis. However, the issues in this case do not implicate the right to travel and are properly subject to rational basis review.
. The PFD application period is governed by AS 43.23.011, which became effective on January 1, 1993 and requires that applications for PFDs be filed between January 2 and March 31 of the dividend year. Chapter 4, section 19(b), SLA 1992 provided that, notwithstanding this section, the application period for 1993 would extend through June 30, 1993.
. Article I, section 7 of the Alaska Constitution provides:
“No person shall be deprived of life, liberty, or property, without due process of law....” The Fifth Amendment to the United States Constitution contains a similar guarantee.
.Similarly, because the Underwoods had nothing more than an inchoate expectancy of a 1993 PFD, they had no property that could have been the subject of a taking in violation of the Fifth Amendment of the Federal Constitution and Article I, section 18 of the Alaska Constitution. Accordingly, this argument also fails.
. Article I, section 15 of the Alaska Constitution provides that "[n]o bill of attainder or ex post facto law shall be passed....”
. In fact, because the entire dividend program is a creature of the legislature, it could have been abolished during the 1992 legislative session, so that no Alaskan received a 1993 PFD.
