Relating to an unauthorized vote by a delegate or alternate delegate to a federal Article V convention; creating a criminal offense.

SB 1187 creates a state jail felony offense for Texas delegates or alternate delegates who knowingly cast an unauthorized vote at a federal Article V convention (a meeting to propose constitutional amendments). The bill directly affects individuals appointed to represent Texas at such conventions. Key provisions include criminal penalties for unauthorized voting, with judges required to impose at least 10 days in county jail as a condition of community supervision, and prohibit crediting that time toward any future sentence. The law takes effect September 1, 2025.