OPALA, J.
4 1 The principal and dispositive issue presented on certiorari is whether the terms of 68 0.8. Supp.2004 § 2817(I) 2 violate the fair cash value standard of Article X, § 8(A)(2) of the Oklahoma Constitution. We answer in the affirmative.3
I
THE ANATOMY OF LITIGATION
T2 In May 2004 Harold Liddell ("Liddell" or "Plaintiff") filed a complaint in the Cleveland County Board of Equalization ("Board"), alleging that Denise Heavner, the Cleveland County Assessor ("Assessor"), had grossly and systematically undervalued real property belonging to certain Cleveland County land developers in violation of the state and federal constitutions. Plaintiff sought a full investigation of all Cleveland County assessments for Tax Years 2008 and 2004, a reassessment of all realty found to be undervalued during those years, the collection of unpaid back taxes from the owners of any realty found to be undervalued, and the implementation of policies and procedures in the Assessor's office to prevent a recurrence of the alleged discriminatory pattern of real estate valuation.
T8 After hearing argument on Liddell's complaint on 25 May 2004, the Board sustained all the challenged valuations. According to Liddell's district court petition, he was told at this proceeding that each of the properties about which he complained had been correctly valued pursuant to the provi[1195]*1195sions 68 0.8. Supp.2004 § 2817(I) [hereinafter § 2817(D) ].
4 Liddell appealed from the Board's decision to the Cleveland County District Court. In addition to the relief he had requested from the Board, Liddell now sought a judicial declaration that the provisions of § 2817(I) violate: (a) Article X, § 8(A)(2) of the Oklahoma Constitution and (b) the Equal Protection Clause of the Fourteenth Amendment of the United States Constitution.4
15 Assessor and Board ("defendants") moved to dismiss plaintiff's petition for lack of standing, failure to state a claim, and failure to include indispensable parties. Their motion was denied.5 The trial court then granted the Attorney General leave to intervene in the cause to defend the constitutionality of § 2817(I). Upon counter motions by the Attorney General and Liddell for summary adjudication of the constitutional issue, the trial court ruled that the statute is constitutional. Liddell dismissed his remaining claims, the trial court entered its judgment in the case and Liddell appealed. The Court of Civil Appeals, Div. I, affirmed the trial court's judgment. We granted plaintiffs petition for certiorari and allowed the
parties to file supplemental briefs. Several interested entities were also given permission to file briefs as amici curiae.6 We now vacate the opinion of the Court of Civil Appeals and reverse the trial court's judgment.
II
THE STANDARD OF REVIEW FOR APPEALABLE PRODUCTS OF SUMMARY PROCESS
$6 Summary process-a special pretrial procedural track pursued with the aid of acceptable probative substitutes 7-is a search for undisputed material facts which, sans forensic combat, may be utilized in the judicial decision-making process.8 Summary relief is permissible where neither the material facts nor any inferences that may be drawn from uncontested facts are in dispute, and the law favors the movant's claim or liability-defeating defense.9 Only those evi-dentiary materials which eliminate from trial some or all fact issues on the merits of the claim or defense afford legitimate support for mist prius resort to summary process for a claim's adjudication.10
[1196]*1196T7 Summary relief issues stand before us for de novo review.11 All facts and inferences must be viewed in the light most favorable to the non-movant.12 Just as nisi prius courts are called upon to do in deciding whether summary relief is warranted in the first instance, so also do appellate tribunals bear an affirmative duty to test for its legal sufficiency all evidentiary material received in summary process as support for the relief granted.13 Only if the court should conclude there is no material fact (or inference) in dispute and the law favors the movant's claim or liability-defeating defense is the moving party entitled to summary relief in its favor.14
III
THE CONSTITUTIONAL AND STATUTORY FRAMEWORK FOR THE VALUATION OF REAL PROPERTY TAXED AD VALOREM
T8 The Legislature has plenary power to tax, subject only to constitutional restrictions and the will of the people expressed through elections.15 All non-exempt property is taxed ad valorem unless the Legislature provides otherwise through the enactment of a substitute tax.16 Ad valorem taxes are direct taxes on real and personal property based on the property's value.17 Determining the value of all county property for purposes of ad valorem taxation is the duty of the county assessor.18
T 9 Until 1972 our fundamental law, Article X, § 8, directed that all property subject to taxation on an ad valorem basis be assessed up to a specified percentage of its fair cash value, estimated at the price it would bring at a fair voluntary sale.19 In Bliss Hotel Co. v. Thompson,20 we held that the term "fair cash [1197]*1197value" was synonymous with the term "fair market value" and that both terms mean "the amount of money which a purchaser willing but not obliged to buy the property would pay to an owner willing but not obliged to sell it, taking into consideration all uses to which the land was adapted and might in reason be applied." 21 (emphasis added)
€ 10 Article X, § 8 was amended in 1972.22 While it continued to require valuation of realty at its fair cash value, estimated at the price it would bring at a fair voluntary sale, the amendment qualified that concept by tying it to the property's actual use or its previous use classification. In furtherance of this new valuation standard, the amendment empowered the Legislature to classify real property by use for the purpose of achieving statewide uniformity in assessment procedures.23 The purpose of the [1972] amendment was to change the standard governing the valuation of real property from market value to use value.24
111 Article X, § 8 was last amended in 1996. The provisions applicable to the valuation of real property were set out in a separate provision from those applicable to the valuation of personal property and the phrase "estimated at the price it would bring at a fair voluntary sale" was removed from its association with real property valuation. The terms of Article X, § 8(A)(2) have provided since 1996:
"§ 8. Valuation of property for taxation-Limit on percentage of fair cash value-Approval by voters.
A. Except as otherwise provided in Article X of this Constitution, beginning January 1, 1997, all property which may be taxed ad valorem shall be assessed for taxation as follows:
Free access — add to your briefcase to read the full text and ask questions with AI
OPALA, J.
4 1 The principal and dispositive issue presented on certiorari is whether the terms of 68 0.8. Supp.2004 § 2817(I) 2 violate the fair cash value standard of Article X, § 8(A)(2) of the Oklahoma Constitution. We answer in the affirmative.3
I
THE ANATOMY OF LITIGATION
T2 In May 2004 Harold Liddell ("Liddell" or "Plaintiff") filed a complaint in the Cleveland County Board of Equalization ("Board"), alleging that Denise Heavner, the Cleveland County Assessor ("Assessor"), had grossly and systematically undervalued real property belonging to certain Cleveland County land developers in violation of the state and federal constitutions. Plaintiff sought a full investigation of all Cleveland County assessments for Tax Years 2008 and 2004, a reassessment of all realty found to be undervalued during those years, the collection of unpaid back taxes from the owners of any realty found to be undervalued, and the implementation of policies and procedures in the Assessor's office to prevent a recurrence of the alleged discriminatory pattern of real estate valuation.
T8 After hearing argument on Liddell's complaint on 25 May 2004, the Board sustained all the challenged valuations. According to Liddell's district court petition, he was told at this proceeding that each of the properties about which he complained had been correctly valued pursuant to the provi[1195]*1195sions 68 0.8. Supp.2004 § 2817(I) [hereinafter § 2817(D) ].
4 Liddell appealed from the Board's decision to the Cleveland County District Court. In addition to the relief he had requested from the Board, Liddell now sought a judicial declaration that the provisions of § 2817(I) violate: (a) Article X, § 8(A)(2) of the Oklahoma Constitution and (b) the Equal Protection Clause of the Fourteenth Amendment of the United States Constitution.4
15 Assessor and Board ("defendants") moved to dismiss plaintiff's petition for lack of standing, failure to state a claim, and failure to include indispensable parties. Their motion was denied.5 The trial court then granted the Attorney General leave to intervene in the cause to defend the constitutionality of § 2817(I). Upon counter motions by the Attorney General and Liddell for summary adjudication of the constitutional issue, the trial court ruled that the statute is constitutional. Liddell dismissed his remaining claims, the trial court entered its judgment in the case and Liddell appealed. The Court of Civil Appeals, Div. I, affirmed the trial court's judgment. We granted plaintiffs petition for certiorari and allowed the
parties to file supplemental briefs. Several interested entities were also given permission to file briefs as amici curiae.6 We now vacate the opinion of the Court of Civil Appeals and reverse the trial court's judgment.
II
THE STANDARD OF REVIEW FOR APPEALABLE PRODUCTS OF SUMMARY PROCESS
$6 Summary process-a special pretrial procedural track pursued with the aid of acceptable probative substitutes 7-is a search for undisputed material facts which, sans forensic combat, may be utilized in the judicial decision-making process.8 Summary relief is permissible where neither the material facts nor any inferences that may be drawn from uncontested facts are in dispute, and the law favors the movant's claim or liability-defeating defense.9 Only those evi-dentiary materials which eliminate from trial some or all fact issues on the merits of the claim or defense afford legitimate support for mist prius resort to summary process for a claim's adjudication.10
[1196]*1196T7 Summary relief issues stand before us for de novo review.11 All facts and inferences must be viewed in the light most favorable to the non-movant.12 Just as nisi prius courts are called upon to do in deciding whether summary relief is warranted in the first instance, so also do appellate tribunals bear an affirmative duty to test for its legal sufficiency all evidentiary material received in summary process as support for the relief granted.13 Only if the court should conclude there is no material fact (or inference) in dispute and the law favors the movant's claim or liability-defeating defense is the moving party entitled to summary relief in its favor.14
III
THE CONSTITUTIONAL AND STATUTORY FRAMEWORK FOR THE VALUATION OF REAL PROPERTY TAXED AD VALOREM
T8 The Legislature has plenary power to tax, subject only to constitutional restrictions and the will of the people expressed through elections.15 All non-exempt property is taxed ad valorem unless the Legislature provides otherwise through the enactment of a substitute tax.16 Ad valorem taxes are direct taxes on real and personal property based on the property's value.17 Determining the value of all county property for purposes of ad valorem taxation is the duty of the county assessor.18
T 9 Until 1972 our fundamental law, Article X, § 8, directed that all property subject to taxation on an ad valorem basis be assessed up to a specified percentage of its fair cash value, estimated at the price it would bring at a fair voluntary sale.19 In Bliss Hotel Co. v. Thompson,20 we held that the term "fair cash [1197]*1197value" was synonymous with the term "fair market value" and that both terms mean "the amount of money which a purchaser willing but not obliged to buy the property would pay to an owner willing but not obliged to sell it, taking into consideration all uses to which the land was adapted and might in reason be applied." 21 (emphasis added)
€ 10 Article X, § 8 was amended in 1972.22 While it continued to require valuation of realty at its fair cash value, estimated at the price it would bring at a fair voluntary sale, the amendment qualified that concept by tying it to the property's actual use or its previous use classification. In furtherance of this new valuation standard, the amendment empowered the Legislature to classify real property by use for the purpose of achieving statewide uniformity in assessment procedures.23 The purpose of the [1972] amendment was to change the standard governing the valuation of real property from market value to use value.24
111 Article X, § 8 was last amended in 1996. The provisions applicable to the valuation of real property were set out in a separate provision from those applicable to the valuation of personal property and the phrase "estimated at the price it would bring at a fair voluntary sale" was removed from its association with real property valuation. The terms of Article X, § 8(A)(2) have provided since 1996:
"§ 8. Valuation of property for taxation-Limit on percentage of fair cash value-Approval by voters.
A. Except as otherwise provided in Article X of this Constitution, beginning January 1, 1997, all property which may be taxed ad valorem shall be assessed for taxation as follows:
[[Image here]]
2. Real property shall not be assessed for ad valorem taxation at a value less than eleven percent (11%) nor greater than thirteen and one-half percent (18.5%) of its fair cash value for the highest and best use for which such property was actually used, or was previously classified for use, during the calendar year next preceding the first day of January on which the assessment is made. The transfer of property without a change in its use classification shall not require a reassessment based exclusively upon the sale value of such property. In connection with the foregoing, the Legislature shall be empowered to enact laws defining classifications of use for the purpose of applying standards to facilitate uniform assessment procedures in this state;
[[Image here]]
€{12 In addition to amending Article X, § 8, the people also approved in 1996 a new constitutional provision relating to the valuation of real property. The provisions of Article X, § 8B prohibit county assessors from increasing the fair cash value of any parcel of real property by more than five percent (5%) per year unless title to the property is transferred, changed, or conveyed to another per[1198]*1198son, or improvements are made to the property, in which case the property is to be assessed for that year based on its fair cash value as provided in Article X, § 8.25
113 Following the 1972 amendment to Article X, § 8, we modified our Bliss Hotel definition of fair cash value to give effect to the new constitutional language linking the valuation of real property to use. In Tulsa County Board of Equalization v. Independent School District No. 1 of Tulsa County,26 we redefined fair cash value to mean "the price which the property would bring at a fair voluntary sale between a purchaser willing but not obliged to buy the property [and] an owner, willing but not obliged to sell it, taking into consideration the property's current use." 27 We reiterated in Tulsa County Board of Equalization that fair cash value is synonymous with fair market value,28 and departed from the Bliss Hotel definition only in regard to the uses of the property that may be taken into account in determining fair market value. Nothing in our jfurispru-dence since Tulsa Board of Equalization suggests that fair cash value means anything other than fair market value qualified by the element of use.
{14 The provisions of 68 0.8.2001 § 2817(G) notwithstanding,29 the Legislature, too, has defined fair cash value in terms of fair market value qualified by use. The statutory definition, codified at 68 0.8.2001 § 2802(18), provides that fair cash value means:
"the value or price at which a willing buyer would purchase property and a willing seller would sell property if both parties are knowledgeable about the property and its uses and if neither party is under any undue pressure to buy or sell and for real property shall mean the value for the highest and best use for which such property was actually used, or was previously classified for use, during the calendar year next preceding the applicable January 1 assessment date; ..." 30 (emphasis added)
The first complete predicate in this simple sentence restates the usual definition of fair market value, while the second complete predicate, joined to the first by the conjunction "and," merely qualifies the uses which may be taken into account when determining fair market value.31
[1199]*1199T15 The Legislature has also adopted a comprehensive set of statutory procedures to guide assessors in determining the fair cash value of real property. Assessors are to physically inspect each parcel of taxable real property in a county on a four year inspection cycle.32 This physical inspection is to consist of "such examination as will provide adequate data from which to make accurate valuations." 33 Assessors must gather information from the physical inspection that is relevant to the type of property being inspected, its use category, and the valuation methodology to be used to establish the property's fair cash value.34 Assessors must gather sufficient information "to establish the fair cash value of the property in accordance with accepted standards for mass appraisal practice.35 They must also maintain for each parcel of real property in the county a comprehensive sales file that contains inter alia a description of relevant property characteristics, sales price information, and such other information as may be required in order to establish a property's fair cash value.36
IV
THE PROVISIONS OF § 2817(D) VIOLATE THE FAIR CASH VALUE STANDARD MANDATED BY ARTICLE X, § 8S(A)@) OF THE OKLAHOMA CONSTITUTION
116 In assessing the conformity of a challenged state statute to our fundamental law, we are guided by well-established principles. The Constitution is the bulwark to which all statutes must yield.37 In determining the validity of a legislative enactment, effect must be given to the intent of the Constitution's framers and the people adopting it 38 without regard to our own view of a provision's propriety, wisdom, desirabili[1200]*1200ty, necessity, or practicality as a working proposition.39 Our search for the framers and electorate's intent is to be conducted by examining the text of the instrument itself and when the text is not ambiguous, the court may not look for a meaning outside its bounds.40 In reviewing a legislative enactment for conformity to the organic law, we presume that, very much like the judiciary, the Legislature conducts its business with due regard for the framers and people's intent. Hence, a duly-enacted statute will be presumed to conform to the state and federal Constitutions and will be upheld unless it is clearly, palpably and plainly inconsistent with the Constitution.41 A heavy burden rests on the party challenging a statute's constitutionality to establish that its enactment is in excess of legislative power.42
117 Liddell challenges the constitutionality of the statutory ascription of meaning to the term fair cash value as applied to lots in platted additions and subdivisions in the provisions of § 2817(I). That section states in pertinent part:
"[Tlhe fair cash value of a lot in any platted addition or a subdivision in a city, town or county zoned for residential, commercial, industrial or other use shall be deemed to be the total purchase price paid by the developer of the addition or subdivision for the land comprising the platted addition or subdivision divided by the number of lots contained in the addition or subdivision until the lot with building or buildings located thereon shall have been conveyed to a bona fide purchaser or shall have been occupied other than as a sales office by the owner thereof, or shall have been leased, whichever event shall first occur."
Liddell argues that the valuation formula in the challenged statute bears no relationship to the Constitutional mandate that real property be assessed at its fair cash value. He contends that fair cash value is synonymous with fair market value and cites to the court's definition of fair cash value in Tulsa County Board of Equalization for its more expansive exposition of the term's meaning.43 Liddell argues that reliance on the § 2817(I) formula results in an undervaluation of property owned by developers in violation of Article X, § 8(A)(2), which prohibits the undervaluation of property when it is taxed ad valorem.44 The Legislature, Liddell says, may specify the means and methods of valuation, but may not direct assessors to undervalue property when taxing it based on value.
118 The State argues that § 2817(I) is a valid exercise of the Legislature's power to create classifications for purposes of taxation. The State identifies two constitutional sources of this power: (1) the provisions of Article X, § 22, Okla. Const., which give the Legislature the power to classify property for purposes of taxation and to value property by different means or methods 45 and (2) the third sentence of Article X, § 8(A)(2), which empowers the Legislature "to enact laws defining classifications of use for the purpose of applying standards to facilitate uniform assessment procedures in this state." 46
119 In its brief amicus curiae the Oklahoma State Home Builders Association ar[1201]*1201gues that § 2817(I) reflects the Legislature's judgment that land under development and construction should be assessed using the same use-based valuation approach applied to farmland, which is valued for ad valorem tax purposes based on its use as farmland regardless of the price it might bring on the open market based on the different use of nearby land for more lucrative purposes.
11 20 To arrive at fair cash value, an assessor must do two things: determine how the real property being assessed was actually used or classified for use during the assessment year and obtain relevant and reliable market data about the value of property of that kind. The Legislature has provided guidance in making both of these decisions, first, by identifying three use categories: residential, commercial-industrial, and agricultural,47 and second, by adopting three standard property appraisal approaches: the comparable sales, cost, and income capitalization methods.48 The Legislature is not limited to the three existing use categories and may recognize others where cireumstances warrant a particularized valuation approach.
121 The first sentence of § 2817(D) says, "If any real property shall become taxable after January 1 of any year, the county assessor shall assess the same and place it upon the tax rolls for the next ensuing year." Under the provisions of § 2817(I), the filing of a plat triggers the separate taxation of the lots drawn on the plat. They must be separately assessed and placed on the tax rolls for the next ensuing year. The challenged portion of § 2817(I) then supplies a method of arriving at their fair cash value for ad valorem tax purposes. It instructs assessors to deem the fair cash value of each platted lot in an addition or subdivision as a pro-rata share of the purchase price of the underlying tract of land on the date of purchase and to freeze that valuation until a building is constructed on the lot and it is either conveyed to a bona fide purchaser, leased, or occupied by the owner as other than a sales office.
122 The provisions of § 2817(I) do not define the terms platted addition or subdivision nor do they define the term lot. Generally, a plat is defined as a map of a subdivision and a lot as a parcel of land on a plat that is separately owned and capable of being separately conveyed. Platting indicates an intent to use the land for a particular purpose in the future. In and of itself, platting does not have any physical impact on the land. It may or may not entail the contemporaneous installation of streets, utilities, and other indicia of development. Land that is platted may continue to be used as it was used prior to platting, it may not be used at all for some period of time, or it may be at any stage of completion toward becoming fully developed building sites.
23 The Legislature, in the exercise of its authority to categorize property by use, may recognize that land with development potential requires a specialized means of determining its fair cash value. As proto-residential or proto-commercial/industrial property, platted lots do not necessarily have a use value commensurate with their fair market value if and when sold as individual units. The fair cash value of the land as a whole may more accurately represent the individual platted lots' current worth. Recognizing this, the Legislature in the provisions of § 2817(I) has implicitly created a separate use category for platted lots and determined that their fair market value is best measured by looking to the value of the underlying tract. This the Legislature is constitutionally empowered to do. What it may not constitutionally do and what it has done in $ 2817(I) is to potentially divorce the valuation of platted [1202]*1202lots from the fair market value of the underlying tract of land as of the relevant assessment date. It arrested the process of annual reassessment required by law.
1 24 The provisions of § 2817(I) invariably value platted lots at the acquisition cost of the underlying tract of land, regardless of the cireumstances of the land's purchase, the time of the purchase in relation to the relevant assessment date, and without considering whether the land remains in the same condition as it was when it was acquired. Excluded from consideration are such things as whether the property was acquired in an arm's length transaction, any compulsion in the sale, changes in the real estate market between the date of the tract's purchase and the relevant assessment date, and alterations in the condition of the property. The aequi-sition cost of the tract as a whole may be a factor in arriving at the value of platted lots, but fixing it rigidly as the sole and conclusive factor violates the fair cash value standard of Article X, § 8(A)(2).
1 25 Moreover, our Constitution mandates annual reassessments of real property, subject to the 5% cap on increases provided by Article X, § 8B. The provisions of § 2817(I) freeze the initial valuation of a lot until a building is constructed on it and it is either conveyed to a bona fide purchaser, leased, or occupied by the owner for a purpose other than as a sales office. The fair cash value of the land may change for many reasons, including the progress made away from a single tract of land that is merely adaptable to subdivision purposes as evidenced by a plat and toward the actual physical creation of lots suitable for sale to many individual buyers. The discrepancy Liddell complains of between the fair cash value of platted lots as measured by the fair market value of the underlying tract as a whole and the fair cash value of individual lots that have been fully developed and sold as building sites can only be addressed in conformity to Article X, § 8B. A freeze at the property's initial valuation is manifestly inconsistent with our fundamental law's command.
[ 26 The dissent would uphold the constitutionality of § 2817(I) on the basis of the language in Article X, § 8 that permits the fair cash value of property to be based upon a property's earlier classification for use during the previous calendar year. Because newly platted lots must be classified, assessed and placed on the tax rolls for the next ensuing year,49 the previous classification to which reference is made in Article X, § 8 would be the classification assigned to the lots during the year they are platted. That classification would be residential or commercial/industrial as the case may be, the same classification the lots would receive based on their current use as of the assessment date. This approach in no way answers the question posed by this case of whether a lot classified as residential or commerecial/in-dustrial can be valued for an indefinite period of time based on a pro-rata portion of the purchase price of the tract of land from which the lots are carved.
127 The dissent also relies upon the sentence in Article X, § 8 that states: "[the transfer of property without a change in its use classification shall not require a reassessment based exclusively upon the sale value of such property." This provision is not applicable to newly platted lots, as to which no transfer is effected by virtue of being platted.
128 Finally, the dissent misinterprets the court's decision to mean that platted lots must invariably be valued at their fair market value. This is not our intent. The legislature may create a valuation method that takes into account how developers use land platted for development. We say today only that such method, which must account for the property's use as a residential or commercial/industrial lot, cannot indefinitely lock in a value.
y
SEVERABILITY ANALYSIS
129 A severability analysis is necessary when some, but not all, provisions [1203]*1203of an enactment are to be condemned as unconstitutional and hence void.50 Its purpose is to determine whether non-offending statutory provisions may survive as valid after the clauses rejected as invalid are separated from the whole. The severability of a statutory enactment is not dependent upon the presence of an express severability clause within the particular enactment's text.51 Survival of untainted statutory provisions that remain is appropriate when the valid and voided (because unconstitutional) provisions are not so "inseparably connected with and so dependent upon" each other that the surviving provisions would not have otherwise been enacted.52 Consideration must be given to whether the surviving provisions must rely on the severed portion for meaning or enforcement.53
130 Because § 2817(I)'s valuation formula for platted lots in additions or subdivisions is constitutionally infirm, we must also determine whether it can be severed from the remainder of the statute, leaving that which is left operational. The general subject matter covered by the provisions of § 2817(I) consists of guidance to assessors in dealing with newly taxable real property. Those provisions not involved in today's pronouncement are not dependent upon the presence of the platted lot valuation formula for their meaning or enforcement. In somewhat different form, the untainted provisions actually predate the enactment of the platted lot valuation formula, a clear indication that they should be regarded as operationally independent of the voided provision. We therefore hold that the platted lot valuation provision of § 2817(I) is severable from the remainder of the statute.
VI
THE PRESUMPTIVE VALIDITY OF 2817(D) CALLS FOR THE PROSPECTIVE APPLICATION OF TODAY'S DECISION
131 Today's pronouncement invalidating the valuation formula for platted lots in additions or subdivisions contained in § 2817(I) casts into doubt the accuracy of valuations made in reliance on the statute. While the instant case involves the valuation of property in Cleveland County alone, it potentially throws into a state of uncertainty and even chaos valuations of platted lots made in every county in this state. All county assessors statewide have until now stood under an obligation to value property held by a developer according to the formula contained in § 2817(I). Ordinarily, an unconstitutional statute confers no rights, creates no liability, and affords no protection.54 Yet, there are well-recognized and well-reasoned [1204]*1204exceptions to this rule. A declaration of a law's constitutional invalidity should not be applied so as to work a hardship or impose lability upon a public official or a private citizen who has acted in good faith and relied on the statute's validity before a court has declared it invalid or before another proper official has given notice that the statute fails to conform to the fundamental law.55 When an invalid statute calls for a compulsory discharge of statutory duties by public officials who rely on the presumptive validity of statutes, this court may give its pronouncement purely prospective effect.56 In the present case, both property owners and county assessors were entitled to rely upon the basic presumption that § 2817(I) was constitutional. We hence hold that today's decision invalidating the valuation formula contained in § 2817(I) will operate prospectively to property valuations made after the date this opinion becomes final.
VII
SUMMARY
132 Oklahoma's fundamental law mandates that real property be valued based upon its current use value. Departure from that command can be authorized only by a vote of the people. By providing a fixed and void formula for the valuation of all platted lots tied to the acquisition cost of the property without regard to the cireumstances of the sale or the interval between the sale and the relevant assessment date and by freezing that valuation until the occurrence of a specified event, the terms of § 2817(D) fail to conform to the Constitutional command that real property be assessed at its fair cash value.
133 THE COURT OF CIVIL APPEALS OPINION IS VACATED AND THE TRIAL COURTS JUDGMENT IS REVERSED
1 34 WINCHESTER, C.J., EDMONDSON, V.C.J., and HARGRAVE, OPALA, WATT, TAYLOR, and COLBERT, JJ., concur
1 35 KAUGER and REIF, JJ., dissent