The Constitution of the State of Texas was adopted by Constitutional Convention November 24, 1875. It was ratified by vote of the People on February 14, 1876. The Texas Constitution establishes the fundamental laws governing the citizens. The current Texas Constitution is one of the longest state constitutions in the United States. The Texas Constitution functions as a limiting document, because it states that the State of Texas has only the powers explicitly granted to it. The Texas Constitution does not contain an equivalent of the Necessary and Proper Clause found in the U.S. Constitution.
Proposals to amend the constitution require two-thirds approval by the members of both houses of the Texas legislature in order to submit to voters for approval or rejection.