Where a civil money penalty is assessed in a final order by the WHD Administrator, by an ALJ, or by the Administrative Review Board (ARB), the amount of the penalty must be received by the WHD Administrator within 30 days of the date of the final order. The person assessed such penalty shall remit the amount thereof, as finally determined, to the Secretary. Payment shall be made by certified check or money order made payable and delivered or mailed according to the instructions provided by the Department; through the electronic pay portal located at www.pay.gov or any successor system; or by any additional payment method deemed acceptable by the Department.