(a) A county assessor-collector may retain a service charge in the amount determined by the board under § 502.1911 from each applicant registering a vehicle by mail. The service charge shall be used to pay the costs of handling and postage to mail the registration receipt and insignia to the applicant.
(b) With the approval of the commissioners court of a county, a county assessor-collector may contract with a private entity to enable an applicant for registration to use an electronic off-premises location. A private entity may retain an amount determined by the board under § 502.1911 for the service provided.

(c) The department may adopt rules to cover the timely application for and issuance of registration receipts and insignia by mail or through an electronic off-premises location.