(a) Except for the authority granted to a port-of-entry supervisor or inspector by Section 621.409, weight enforcement officers have exclusive authority to enforce this subchapter in any area of this state, including all ports of entry between Texas and the United Mexican States.
(b) If a noncommissioned employee weighs a vehicle under Section 621.402 and determines that an enforcement action, such as the issuance of a citation, is warranted, the employee may take enforcement action only if the employee is under the supervision of an officer of the Department of Public Safety.