(a) Except as provided by Subsection (b), a state or local agency must accept the substitute post office box address designated by the attorney general if the substitute address is presented to the agency by a participant in place of the participant's true residential, business, or school address.
(b) The attorney general by rule may permit an agency to require a participant to provide the participant's true residential, business, or school address, if necessary for the agency to perform a duty or function that is imposed by law or administrative requirement.