TLI - where did you get that “14 years” version? The version online at http://tlo2.tlc.state.tx.us/statutes/docs/FA/content/htm/fa.001.00.000002.00.htm#2.102.00 shows 16 years as the minimum age.
It poped up on a Google search but I posted the version you have linked in my Post 38. That appears to be the latest and greatest. Looks to me like they ammend the code about two times a year.