HB 4385 modifies the definition of residence for voting purposes under the Texas Election Code. It establishes that a person is considered to have left their residence for more than temporary purposes if they do not reside there for at least 180 days in a calendar year. However, exceptions are made for members of the armed forces and their dependents, full-time students living on campus, and members of the Texas Legislature or U.S. Congress. Additionally, the bill restricts the ability to claim residency at a commercial building or a recreational vehicle, with exceptions for RVs if certain documents, such as a driver’s license, utility bill, or tax records, confirm the address. The changes apply to elections held on or after September 1, 2025.