Texas Transportation Code - TRANSP § 68.035. Application for License or Certificate

(1) a certification by a medical doctor, dated not earlier than the 15th day before the date of the application, stating that in the doctor's opinion the applicant on the date of the certification possesses the mental and physical health necessary to perform competently and safely the duties of a branch pilot or deputy branch pilot, as applicable; or

(2) a certification by a medical doctor, dated not earlier than the 15th day before the date the application is filed, certifying that the applicant's body on the date of the certification is free of evidence of the presence of illegal drugs or chemicals.