*977 Opinion
Revenue and Taxation Code section 1604, subdivision (c) (hereinafter section 1604(c)) provides that if a taxpayer applies to a county board of supervisors acting as the county assessment appeals board for a reduction in the assessed value of real property, and if the board does not act on the application within two years thereafter, and if the parties have not in writing mutually agreed to extend the two-year period, then the taxpayer’s opinion of the property’s market value is to be accepted as the basis of the value “upon which taxes are to be levied.” On this appeal we address (1) whether there was a writing that extended the two-year period, and (2) whether section 1604(c) establishes a mandatory duty that is to be enforced according to its plain language. Answering the first inquiry in the negative and the second in the affirmative, we find it unnecessary to reach a contention that section 1604(c) is unconstitutional.
Background
At all pertinent times plaintiff Shell Western E & P, Inc., was the lessee of rights to develop and sell the geothermal resources extracted from three parcels of land in the County of Lake owned by the United States. With respect to the 1983-1984 fiscal year, the assessor of the defendant county assessed the value of Shell’s possessory interests in the parcels at $77,109,300. In August of 1983 Shell paid the assessed taxes in the amount of $761,065.16. The following month Shell applied to the county’s board of equalization for reduction of the assessments to $20,068,400 (which would have reduced Shell’s taxes by $562,996.41 to $198,068.75).
The hearing on Shell’s applications conducted by the county’s board of supervisors acting as the county’s board of equalization began in July of 1986 and extended through November of that year, at which time the applications were submitted for decision. Shell’s applications were heard in conjunction with similar applications submitted by Sterling Grace Management, L.P., and Grace Geothermal Corporation (hereinafter collectively referred to as Grace), which had purchased Shell’s possessory interests in September of 1983. The board rejected Shell’s argument that section 1604(c) required that Shell’s assessment figures be accepted due to the delay of the hearing, the board finding that the attorney representing both Shell and Grace had executed a written stipulation extending the period for hearing the applications. In January of 1987 the board denied the applications.
Following the county’s denial of its claims for refund, Shell initiated this action by filing a complaint for recovery of the $562,996.41 in taxes it *978 allegedly overpaid. During the course of a bench trial, the court received evidence in the form of testimony and the administrative record of proceedings before the board. 1 Concluding that the purported stipulation was ineffective, and that section 1604(c) not only had been correctly invoked by Shell but was “dispositive,” the court entered judgment against the county for $562,996.41 plus interest. The county thereupon perfected this timely appeal.
Review
I
As applicable to the various stages of this case, section 1604(c) provided in pertinent part: “If the county assessment appeals board fails to hear evidence on the application for reduction in assessment of property within two years of the timely filing of the application, the taxpayer’s opinion of market value as reflected on the application . . . shall prevail as the basis upon which taxes are to be levied, unless the taxpayer and the county assessment appeals board mutually agree in writing to an extension of time for the hearing . . . ,” 2
The parties’ briefs begin with the county’s challenge to the constitutionality of section 1604(c). They then discuss how the statute should be construed if it is found constitutional. Only in conclusion do they address the sole fact-specific contention before us—whether the board correctly treated Shell as having “agree[d] in writing to an extension of time for the hearing.” But this is to go at the problem from the wrong direction. If Shell did agree to extend the hearing, there would be no need either to construe section 1604(c) or to decide its constitutionality. If Shell did not so agree, but its claim for refund can be defeated by reason of statutory construction alone, there would still be no necessity for grappling with any constitutional arguments. Only when these two approaches have been tried and found wanting might there be occasion to examine the county’s constitutional arguments. We therefore reverse the parties’ analytical sequence in order to find the most narrow basis for our decision.
*979 The writing at issue is in the form of a stipulation. After hearing extrinsic evidence concerning the circumstances surrounding its drafting and execution, the board made findings to the effect that the stipulation extending the period within which the board could act on the reduction applications of Grace also extended the period for taking action on Shell’s applications, notwithstanding the fact that Shell is never mentioned in the stipulation. The board apparently reasoned that because Grace and Shell were jointly represented by the attorney who executed the stipulation, and because the assessment reduction applications of Grace and Shell were being treated as a single matter, “it was the intent that such stipulation applied to both [Shell] and Grace.” From this the board concluded that the provisions of section 1604(c) “do not apply.” After reviewing the evidence before the board and receiving additional extrinsic evidence, the trial court determined that the board’s findings were not supported by substantial evidence. The court further determined that the board’s conclusion as to the applicability of section 1604(c) “is an incorrect statement of the law[,] ... is not supported by law and is . . . contrary to the law . . . because the provisions of Section 1604(c) do apply.”
The county contends that the trial court erred in conducting an independent examination of the issue and in not concluding that the board’s findings were supported by substantial evidence in the record of proceedings before the board. Ignoring what transpired before the board, Shell claims that the court’s findings are supported by “the uncontradicted evidence” introduced at the trial, and that “[t]he question before the Superior Court was one of law.” This stark disagreement as to what the court was to decide and on what evidentiary basis that decision was to be made necessitates a brief discussion of the board’s decisional powers and the extent of judicial review.
The California Constitution specifies that “[t]he county board of supervisors, or . . . assessment appeals boards created by the county board of supervisors, shall constitute the county board of equalization” with the duty to “equalize the values of all property on the local assessment roll by adjusting individual assessments.” (Cal. Const., art. XIII, § 16.) Accordingly, “while sitting as a board of equalization, the county board of supervisors is a constitutional agency exercising quasi-judicial powers delegated to the agency by the Constitution”
(Westlake Farms, Inc.
v.
County of Kings
(1974)
On the other hand, courts are authorized to conduct an independent reassessment “when a board of equalization purports to decide a question of law.”
(Board of Supervisors
v.
Archer
(1971)
The trial court’s statement of decision does not explicitly identify the basis for the court’s determination why the board’s decision concerning the stipulation could not stand. There appear to be two possible rationales. Each is sound.
First, the trial court could have concluded as a matter of law that the written stipulation was not ambiguous.
3
The stipulation (which is reproduced as an appendix to this opinion) is subject to the same rules of construction applied to contracts. (See
J. C. Penney Co.
v.
Superior Court
(1959)
There is a second, equally plausible course of reasoning which the trial court might have followed. The court could have determined that extrinsic evidence was properly admitted by the board for the purpose of demonstrating whether the nonintegrated stipulation was reasonably susceptible to the county’s interpretation that Shell was also a party to the agreement. (See
Tahoe National Bank
v.
Phillips
(1971)
In addition to what has already been said about the writing itself (which was, of course, a part of the board’s record), the extrinsic evidence heard by the board only serves to further impeach its determination that Shell was precluded from invoking section 1604(c) because it was a party to the written extension.
4
Because the writing was drafted by the county,
*982
ambiguities will be resolved against the county. (Civ. Code, § 1654;
Tahoe National Bank
v.
Phillips, supra,
The element common to each of these possible grounds on which the trial court reached its decision is the absence between Shell and the county of that meeting of minds needed for an enforceable agreement. (See Civ. Code, §§ 1550, 1565, 1580;
Merced County Sheriff’s Employee's Assn.
v.
County of Merced
(1987)
II
Having thus failed to establish that the board was empowered to decide Shell’s applications because the stipulation extended the period for that decision, the county asks us to conclude that the trial court erroneously construed section 1604(c). The trial court enforced the statute according to its plain terms—it being undisputed that the board did not hear evidence on Shell’s applications, section 1604(c) required that “the taxpayer’s opinion of market value as reflected on the application for reduction in assessment. . . shall prevail as the basis upon which taxes are to be levied.” The county contends that its use of the mandatory “shall” notwithstanding, section 1604(c) is only “directory” because “it was enacted to ensure the orderly and timely conduct of business by the Board.” This contention, which involves a pure issue of law that courts review independently of administrative action
(see Estate of Madison
(1945)
The essence of this issue is to decide whether section 1604(c) commands an obligatory procedure or merely exhorts a “directory” duty that a county board of equalization should follow. (See
People
v.
McGee
(1977)
Examination of the text of section 1604(c) discloses that virtually all discernible indicia point to the conclusion that it is indeed mandatory. The most notable feature of the statute’s express language is its use of the word “shall,” which the Legislature has declared to be mandatory. (Rev. & Tax. Code, § 16.) This shows that something more than a hortatory admonition was intended. (See
Cake
v.
City of Los Angeles
(1913)
Upon examination of the text, the legislative intent behind section 1604(c) is inescapable. The purpose of this statute is obvious: to expedite processing of assessment reduction applications so that those who seek reductions in the amount of taxes already paid are not cast into a bureau
*985
cratic limbo where there is no light at the end of the administrative tunnel. Although delay in processing such applications does not “subserve [any] public interest”
(Pulcifer
v.
County of Alameda, supra,
III
There remains only the county’s contention that section 1604(c) is unconstitutional in that (1) “it permits property to be taxed using a standard of valuation other than that prescribed by the constitution” (see Cal. Const., art. XIII, § 1); (2) “it allows an unconstitutional grant of a partial or complete exemption of property from taxation” (see
ibid.)-,
and (3) “the Legislature has unlawfully delegated the equalization authority of the county board of equalization to the taxpayer.” Acknowledging that its failure to raise these issues at any point in the course of the extensive proceedings conducted before the board and the trial court would ordinarily be treated as a waiver of its right to appellate review, the county nevertheless urges us to exercise our discretion to reach the merits of its contention because it involves only a question of law that is of significant public interest. (See
Hale
v.
Morgan
(1978)
The first and second of the county’s particular objections involve pure issues of law only if they are considered as presented in the county’s briefs. The county does not attack the method of valuation used by Shell to com *986 pute the assessable value of its former property interests in Lake County, nor does the county assert that the valuation method used by Shell resulted in either a complete or a partial exemption of taxable property. Stripped from the actual reality of the record, the county’s claims on these points inhabit the realm of purest speculation. The public interest in having the county’s claims adjudicated appears dubious. From the dearth of reported decisions concerning the application of section 1604(c), it is reasonable to accept that the statute is being observed without incident. There is consequently no basis for assuming that taxpayers and county boards of equalization throughout California are eagerly anticipating judicial answers to the county’s belatedly conceived constitutional arguments. In light of these circumstances we decline to exercise our discretionary power to overlook the county’s history of silent inaction.
The judgment is affirmed.
Perley, J., and Reardon, J., concurred.
*987 Appendix
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*988 [[Image here]]
Notes
Pursuant to stipulation between the parties, the actions for tax refunds commenced by Grace as well as Shell were consolidated for purposes of trial.
Effective January 1, 1987, section 1604(c) was amended to provide in pertinent part: “If the county assessment appeals board fails to hear evidence and fails to make a final determination on the application for reduction in assessment of property within two years of the timely filing of the application, the taxpayer’s opinion of market value as reflected on the application . . . shall be the value upon which taxes are to be levied for the tax year covered by the application, unless the taxpayer and the county assessment appeals board mutually agree in writing to an extension of time for the hearing . . . .” (Stats. 1986, ch. 982, § 28, p. 3401.) This amendment does not alter the substance of section 1604(c) as we construe it here.
We agree with the trial court’s conclusion that “as a matter of law . . . [section 1604(c)] requires that any agreement for the extension of time for hearing must be a written agreement.” The plain language of the statute leaves no room for any other interpretation. (Cf.
Estate of MacDonald
(1990)
After matters had reached the trial court, the county couched this argument in terms of estoppel and unclean hands. The court found against the county on both of these issues. The county does not challenge these findings on this appeal.
In deciding how the stipulation should be construed when there was no conflict in the extrinsic evidence (as opposed to conflicting inferences that might be drawn from that evidence), the board purported to resolve an issue of law. (See
Gribaldo, Jacobs, Jones & Associates
v.
Agrippina Versicherunges A.G.
(1970)
“Against an unwilling party; against one not assenting. A term applied to proceedings against an adverse party, to which he does not consent.” (Black’s Law Diet. (5th ed. 1979) p. 704, col. 2.)
