To be eligible for a certificate as a deputy branch pilot in the jurisdiction of the pilot board of a navigation district in Cameron County, a person must:
(1) be at least 25 years of age;
(2) be a United States citizen;
(3) hold a license under federal law to act as a pilot on vessels that navigate water on which the applicant will furnish pilot services;
(4) be in good mental and physical health;
(5) have good moral character;
(6) possess the requisite skill to perform competently and safely the duties of a deputy branch pilot; and
(7) be selected for appointment by a branch pilot licensed for water in that board's jurisdiction.