Tex. Government Code § 316.008

(a) Unless the legislature adopts a resolution under Section 22, Article VIII, Texas Constitution, raising the proposed limit on appropriations from state tax revenues not dedicated by the constitution, the proposed limit is binding on the legislature with respect to all appropriations for the next state fiscal biennium made from those revenues. The proposed limit on consolidated general revenue appropriations is binding on the legislature with respect to all appropriations for the next state fiscal biennium made from those sources unless the legislature adopts a resolution raising the proposed limit that is approved by a record vote of three-fifths of the members of each house of the legislature. The resolution must find that an emergency exists, identify the nature of the emergency, and specify the amount authorized. The excess amount authorized under this subsection may not exceed the amount specified in the resolution.

(b) The rules of the house of representatives and senate shall provide for enforcement of Subsection (a).