See http://texreg.sos.state.tx.us/public/re ... ch=6&rl=12.
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(1) Evidence of proficiency. The applicant must submit evidence of proficiency, as defined by §6.11 of this title (relating to Proficiency Requirements) reflecting the successful completion of a handgun proficiency course approved by the department and taught by a certified handgun instructor. Evidence of proficiency submitted by an original applicant will not be accepted by the department if it is more than two years old. Evidence of proficiency submitted by a renewal applicant will not be accepted by the department if it is more than six months old.