(a) A branch pilot's license expires on the earlier of:
(1) the fourth anniversary of the date it is issued or renewed; or
(2) the license holder's 68th birthday.
(b) Subsection (a)(2) does not apply to a person who is a branch pilot serving a port covered under this chapter on the effective date of this chapter or who reaches his or her 68th birthday within one year after the effective date of this chapter.
(c) A deputy branch pilot's certificate expires on the second anniversary of the date it is issued and may not be renewed.