Unless a higher initial maximum uniform allowance rate is payable under § 591.104 to an employee who is required by statute, regulation, or an agency's written administrative procedures to wear a uniform, the head of each agency concerned, out of funds available, shall—

(a) Pay an allowance for a uniform not to exceed $800 a year; or

(b) Furnish a uniform at a cost not to exceed $800 a year.

(c) Any agency which provides a uniform allowance under paragraph (a) of this section must establish policies to administer the uniform allowance program, including uniform standards acceptable to the agency.