Effective January 1, 1994, all motorboats and all outboard motors must be titled. Also sailboats 14 feet and over in length must be titled
http://tpwd.texas.gov/fishboat/boat/owner/titles_and_registration/
Anyone born on or after September 1, 1993 who wishes to operate certain vessels on the public waterways of Texas.
http://tpwd.texas.gov/education/boater-education/