Tex. Const. art. VIII, § 1-n (S.J.R. 6, 2001)

(a) To promote economic development in this state, the legislature by general law may exempt from ad valorem taxation goods, wares, merchandise, other tangible personal property, and ores, other than oil, natural gas, and other petroleum products, if:

(1) the property is acquired in or imported into this state to be forwarded to another location in this state or outside this state, whether or not the intention to forward the property to another location in this state or 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 at a location in this state that is not owned or under the control of the property owner for assembling, storing, manufacturing, processing, or fabricating purposes by the person who acquired or imported the property; and

(3) the property is transported to another location in this state or outside this state not later than 270 days after the date the person acquired the property in or imported the property into this state.

(b) For purposes of this section:

(1) tangible personal property includes aircraft and aircraft parts;

(2) property imported into this state includes property brought into this state;

(3) property forwarded to another location in this state or outside this state includes property transported to another location in this state or outside this state or to be affixed to an aircraft to be transported to another location in this state or outside this state; and

(4) property detained at a location in this state for assembling, storing, manufacturing, processing, or fabricating purposes includes 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 this state 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.

(c) A property owner who is eligible to receive the exemption authorized by Section 1-j of this article may apply for the exemption authorized by the legislature under this section in the manner provided by general law, subject to the provisions of Subsection (d) of this section. A property owner who receives the exemption authorized by the legislature under this section is not entitled to receive the exemption authorized by Section 1-j of this article for the same property.

(d) The governing body of a political subdivision that imposes ad valorem taxes may provide for the taxation of property exempt under a law adopted under Subsection (a) of this section and not exempt from ad valorem taxation by any other law. Before acting to tax the exempt property, the governing body of the political subdivision must conduct a public hearing at which members of the public are permitted to speak for or against the taxation of the property.