(a) To promote economic development in the State, goods, wares, merchandise, other tangible personal property, and ores, other than oil, natural gas, and other petroleum products, are exempt from ad valorem taxation by a political subdivision of this State if:
(1) the property is acquired in or imported into this State to be forwarded outside this State, whether or not the intention to forward the property outside this State is formed or the destination to which the property is forwarded is specified when the property is acquired in or imported into this State;
(2) the property is detained in this State for assembling, storing, manufacturing, processing, or fabricating purposes by the person who acquired or imported the property; and
(3) the property is transported outside of this State not later than:
(A) 175 days after the date the person acquired or imported the property in this State; or
(B) if applicable, a later date established by the governing body of the political subdivision under Subsection (d) of this section.
(b) The governing body of a county, common, or independent school district, junior college district, or municipality that, acting under previous constitutional authority, taxes property otherwise exempt by Subsection (a) of this section may subsequently exempt the property from taxation by rescinding its action to tax the property. The exemption applies to each tax year that begins after the date the action is taken and applies to the tax year in which the action is taken if the governing body so provides. A governing body that rescinds its action to tax the property may not take action to tax such property after the rescission.

(c) For purposes of this section:
(1) tangible personal property shall include aircraft and aircraft parts;
(2) property imported into this State shall include property brought into this State;
(3) property forwarded outside this State shall include property transported outside this State or to be affixed to an aircraft to be transported outside this State; and
(4) property detained in this State for assembling, storing, manufacturing, processing, or fabricating purposes shall include property, aircraft, or aircraft parts brought into this State or acquired in this State and used by the person who acquired the property, aircraft, or aircraft parts in or who brought the property, aircraft, or aircraft parts into this State for the purpose of repair or maintenance of aircraft operated by a certificated air carrier.
(d) The governing body of a political subdivision, in the manner provided by law for official action, may extend the date by which aircraft parts exempted from ad valorem taxation under this section must be transported outside the State to a date not later than the 730th day after the date the person acquired or imported the aircraft parts in this State. An extension adopted by official action under this subsection applies only to the exemption from ad valorem taxation by the political subdivision adopting the extension. The legislature by general law may provide the manner by which the governing body may extend the period of time as authorized by this subsection.