William R. Lowry, who is the appellant in Case No. S97A2089 and the cross-appellee in Case No. S97X2092, brought this action against the Revenue Commissioner of the Georgia Department of Revenue (T. Jerry Jackson), and the Tax Commissioner of Cobb County, Georgia (Jim McDuffie), contending that OCGA § 48-5-472 (b), as amended in 1995 and 1997,1 creates an exemption from ad *203valorem taxation for dealer-owned motor vehicles that are held for sale or resale; that, contrary to the commissioners’ contention, the exemption was not authorized by Art. VII, Sec. I, Par. Ill (b) (3) (Paragraph III (b) (3)) of the Georgia Constitution; and that the exemption was specifically precluded by Art. VII, Sec. II, Pars. I and II of the Georgia Constitution and thus violated those paragraphs of the Constitution. The trial court ruled that Lowry had standing to bring this action, but upheld the statute against Lowry’s constitutional challenge. For the reasons that follow, we rule that Lowry has standing to challenge the constitutionality of the statute, but that his constitutional challenge lacks merit.

1. The question whether Lowry has standing to attack the constitutionality of § 48-5-472 (b) has been decided favorably to Lowry by this Court in Wasden v. Rusco Industries.2 In that case, Wasden, a taxpayer of Jenkins County, contended that a tax exemption granted by the Board of Commissioners of Jenkins County to a fellow taxpayer was not authorized by the Georgia Constitution. This Court concluded that he had standing to bring the action.

[Wasden] is a citizen and taxpayer of Jenkins County. Each taxpayer in Jenkins County is required to pay his proper share of the taxes levied there. Each taxpayer has an interest in seeing that no other taxpayer is illegally exempted from the payment of such tax. An illegal exemption places a greater tax burden upon those taxpayers being required to pay. We recognize that the attempted grant of the tax exemption by Jenkins County was motivated by an interest in furthering the industrial development of the community and in the belief that the exemption was authorized. However, the exemption was not authorized and the judgment in action No. 1805 declaring otherwise is void on its face. Was-den may attack such judgment because it is material to his interest to have it vacated.3

The same reasoning is applicable to the present case, and leads to the conclusion that Lowry has standing to challenge the constitutionality of § 48-5-472 (b). This holding is also consistent with our hold*204ings that a taxpayer has standing to contest the legality of the expenditure of public funds of a municipality;4 that “any owner of property subject to taxation” has standing to seek to enjoin “taxing authorities from proceeding under [an] alleged void and illegal tax digest[ ]”;5 and that a taxpayer has standing to seek to enjoin public officials from committing ultra vires acts.6

2. Having determined that Lowry has standing, we next address whether the trial court properly ruled that § 48-5-472 (b) exempts dealer-owned motor vehicles from ad valorem taxation. We conclude that the trial court correctly decided this issue.

In making this determination, we must balance two rules of statutory construction. First, “[i]t is a cardinal rule in the construction of grants of exemptions from taxation, whether such grants be by statute or the constitution, that such exemptions should be strictly construed in favor of the public, and that nothing passes by implication.”7 On the other hand, if the language of a statute “ ‘is plain and susceptible of but one natural and reasonable construction, the court has no authority to place a different construction upon it, but must construe it according to its terms.’ ”8

Subsection (b) of § 48-5-472 provides that “motor vehicles which are owned by a dealer and held in inventory for sale or resale . . . shall not be returned for ad valorem taxation, shall not be taxed, and no taxes shall be collected on such motor vehicles until they are transferred and then become subject to taxation.” Black’s Law Dictionary defines the word “exempt” as follows: “To relieve certain classes of property . . . from taxation.”9 Because the language of § 48-5-472 (b) relieves a certain class of property — dealer-owned motor vehicles held for sale or resale — from taxation, we can only conclude that the statute plainly, not impliedly, grants an exemption from ad valorem taxation for such dealer-owned vehicles.

3. Article VII, Sec. II, Par. I of the Georgia Constitution provides that “[e]xcept as authorized in or pursuant to this Constitution, all laws exempting property from ad valorem taxation are void.” Article VII, Sec. II, Par. II (a) (1) provides that

*205[e]xcept as otherwise provided in this Constitution, no property shall be exempted from ad valorem taxation unless the exemption is approved by two-thirds of the members elected to each branch of the General Assembly in a roll-call vote and by a majority of the qualified electors of the state voting in a referendum thereon.

In addition, Art. VII, Sec. II, Par. II (a) (4) provides that “[t]he requirements of this subparagraph (a) shall not apply with respect to ... an exemption authorized pursuant to this Constitution.”

These constitutional provisions make clear that, for a law granting a tax exemption to be constitutional, it must have been authorized by a specific provision of the Georgia Constitution, or it must have been created pursuant to the procedure specified in Art. VII, Sec. II, Par. II (a) (1) of the Constitution.

In this case, Lowry contends that the trial court erred in construing Par. Ill (b) (3) of the Constitution to authorize the General Assembly to create the ad valorem tax exemption codified at § 48-5-472 (b) (2).10 If Lowry is correct in this contention, then he is likewise correct that the exemption is unconstitutional since Par. Ill (b) (3) of the Constitution is the only possible constitutional authority for enacting the exemption.

In this regard, Lowry urges that Par. Ill (b) (3) of the Georgia Constitution should not be construed to authorize the legislature to create the exemption granted by § 48-5-472 (b) (2) since Par. Ill (b) (3) does not use the words “exempt” or “exemption,” and since, according to Lowry, to so construe Par. Ill (b) (3) would place it in conflict with Art. VII, Sec. II, Pars. I and II of the Georgia Constitution. We disagree with Lowry’s contentions, and thus affirm the trial court’s ruling.

Paragraph III (b) (3) of the Georgia Constitution provides, in relevant part, as follows:

Motor vehicles may be classified as a separate class of property for ad valorem property tax purposes, and such class may be divided into separate subclasses for ad valorem purposes. The General Assembly may provide by general law for the ad valorem taxation of motor vehicles including, but not limited to, providing for different rates, methods, assessment dates, and taxpayer liability for such class and for each of its subclasses and need not provide for uniformity *206of taxation with other classes of property or between or within its subclasses.

We conclude that the plain language of Par. Ill (b) (3) is broad enough to authorize the General Assembly to grant an exemption to dealer-owned motor vehicles, and that Par. Ill (b) (3) is not in conflict with Art. VII, Sec. II, Pars. I and II.

In determining whether Par. Ill (b) (3) authorized the General Assembly to create tax exemptions for dealer-owned motor vehicles, we are mindful that the same rule that governs whether a statute grants a tax exemption also applies to exemptions granted by constitutional provisions.11 Against this consideration, we must balance the rule that this Court must honor the plain and unambiguous meaning of a constitutional provision.12

Paragraph III (b) (3) provides that the General Assembly may classify motor vehicles as a separate class of motor vehicles for ad valorem tax purposes; that it may create subclasses of motor vehicles for ad valorem tax purposes; that it may provide “by general law for the ad valorem taxation of motor vehicles including, but not limited to, providing for different rates, methods, assessment dates, and taxpayer liability for such class and each of its subclasses”; and that it need not “provide for uniformity of taxation with other classes of property or between or within its subclasses.” Broader language regarding the General Assembly’s power to tax or not to tax motor vehicles can hardly be imagined. Despite Lowry’s protestations to the contrary, the plain language of the constitution empowers the General Assembly to create subclasses of motor vehicles and to provide that those subclasses will have no tax liability. Thus, the power to exempt13 a subclass of motor vehicles from taxation is not granted by implication14 but by the plain language of Par. Ill (b) (3).

As a final matter, we find no merit to Lowry’s contention that to construe Par. Ill (b) (3) to authorize the General Assembly to create a tax exemption places it in conflict with Art. VII, Sec. II, Pars. I and II of the Constitution. First, the opening clause of Par. I of Art. VII, Sec. II, simply provides that all laws exempting property from taxation must be authorized by the Constitution. Because Par. Ill (b) (3) is a provision of the Constitution, construing it to authorize the General Assembly to create an exemption does not place it in conflict with Par. I of Art. VII, Sec. II.

*207Second, Par. II (a) (1) of Art. VII, Sec. II, provides that “[e]xcept as otherwise provided in this Constitution, no property shall be exempted from ad valorem taxation” unless the procedures specified in that subparagraph are followed. Because Par. Ill (b) (3) is another provision of the Constitution that authorizes the General Assembly to create a tax exemption, it is consistent with the exception provided by the opening clause of Par. II (a) (1) of Art. VII, Sec. II.

4. For the foregoing reasons, we affirm the judgment of the trial court.

Judgments affirmed in Case Nos. S97A2089 and S97X2092.

concurring specially.

I agree with the majority that, under Georgia law, a taxpayer generally has standing to challenge the constitutionality of a tax exemption. Thus, I concur in Division 1 and the judgment of affirmance in Case No. S97X2092. However, I also believe that OCGA § 48-5-472 (b) does not create a tax exemption at all and that, therefore, we need not reach the issue of whether that statute creates a constitutional tax exemption. “ ‘[I]t is well established that this court will never decide a constitutional question if the decision of the case presented can be made upon other grounds. (Cit.)’ [Cit.]” Board of Tax Assessors v. Tom’s Foods, Inc., 264 Ga. 309, 310 (444 SE2d 771) (1994). Accordingly, I concur specially as to the affirmance of the judgment in Case No. S97A2089.

The former statutory scheme provided that every motor vehicle owned in this state on January 1 was subject to ad valorem taxation. East West Express v. Collins, 264 Ga. 774, 775 (1) (449 SE2d 599) (1994). However, Art. VII, Sec. I, Par. III (b) (3) of the Georgia Constitution of 1983 specifically authorizes the General Assembly to provide for different ad valorem “assessment dates, and taxpayer liability” for motor vehicles and subclasses of motor vehicles. Pursuant to this constitutional provision, the General Assembly has changed the “assessment date” for motor vehicles from January 1 to “the time the owner applies or is required by law to apply for registration of the motor vehicle and for the purchase of a license plate. . . .” OCGA § 48-5-473 (a) (1). The General Assembly thereby also effected a change in “taxpayer liability,” because dealers are never required to register and obtain a license for a motor vehicle held for resale. OCGA § 40-2-20 (a) (1). Thus, the existing ad valorem taxation statutes cannot apply to a motor vehicle held for resale by a dealer until such time as it is transferred to a non-dealer and the time for registration has arrived. However, the new statutory scheme does apply *208to motor vehicles which are owned by a dealer and not held for resale, because those motor vehicles are subject to the registration and licensing requirement of OCGA § 40-2-20.

As I construe OCGA § 48-5-472 (b), that statute merely recognizes the inapplicability of this new ad valorem tax procedure to motor vehicles which are owned by a dealer and held in inventory for sale or resale. Such vehicles are now considered to be in a separate subclassification until they are transferred, and OCGA § 48-5-472 (b) does not exempt them from taxation or even relate to the subject of exemptions. See OCGA § 48-5-473 (c); Baggett v. Mobley, 171 Ga. 268, 272 (155 SE 334) (1930). The distinction between a separate subclas-sification for taxation purposes and an exemption from taxation is not a mere distinction without a difference. Under the old statutory scheme, the arrival of January 1 was a taxable event for all cars owned in this state. Under the new statutory scheme, a taxable event for motor vehicles held for resale by a dealer does not occur until the time for registration after resale. Thus, motor vehicles held for resale by a dealer are not “exempt” from any existing taxation, but, as was the case with cars only brought into Georgia after January 1 under the old scheme, these vehicles are simply in a separate subclassification of such tangible property as has yet to become taxable under the ad valorem tax laws of this state. Accordingly, OCGA § 48-5-472 (b) does not create an unconstitutional tax exemption because it purports to create no tax exemption at all. Therefore, I concur specially in the majority’s holding that the statute is constitutional.