Not as long as he/she is under the direct control and supervision of an adult.
At age 17 he/she is required to successfully complete a Hunter Education Certification course.
Direct control and supervision means they are hunting with in a few feet of the adult the entire time. Generally within normal voice talking distance.
It is the responsibility of the adult hunter to check with their local game warden for clarification of “Direct Control” – you do not want to get a ticket for this rule.
More information may be found in the Texas Parks & Wildlife Department – Outdoor Annual – Located HERE
If in doubt – why not just become Hunter Education Certified hunter?