Sec. 21.05.  COMMERCIAL AIRCRAFT.  (a)  If a commercial aircraft that is taxable by a taxing unit is used both in this state and outside this state, the appraisal office shall allocate to this state the portion of the fair market value of the aircraft that fairly reflects its use in this state.  The appraisal office shall not allocate to this state the portion of the total market value of the aircraft that fairly reflects its use beyond the boundaries of this state.
(b)  The allocable portion of the total fair market value of a commercial aircraft that is taxable in this state is presumed to be the fair market value of the aircraft multiplied by a fraction, the numerator of which is the product of 1.5 and the number of revenue departures by the aircraft from Texas during the year preceding the tax year, and the denominator of which is the greater of (1) 8,760, or (2) the numerator.
(c)  During the time in which any commercial aircraft is removed from air transportation service for repair, storage, or inspection, such aircraft is presumed to be in interstate, international, or foreign commerce and not located in this state for longer than a temporary period for purposes of Section 11.01 of this code.
(d)  A certificated air carrier shall designate the tax situs of commercial aircraft that land in Texas as either the carrier's principal office in Texas or that Texas airport from which the carrier has the highest number of Texas departures.
(e)  For purposes of this subchapter, a commercial aircraft shall mean an instrumentality of air commerce that is:
(1)  primarily engaged in the transportation of cargo, passengers, or equipment for others for consideration;
(2)  economically employed when it is moving from point to point as a means of transportation;  and
(3)  operated by a certificated air carrier.  A certificated air carrier is one engaged in interstate or intrastate commerce under authority of the U.S. Department of Transportation.
Added by Acts 1989, 71st Leg., ch. 534, Sec. 6, eff. Aug. 28, 1989.