When services are performed by the GPA for which no specific charges are published in the MTOS, the rates in Rules 5-184 and 5-185 for equipment and labor will be charged for performing such services, subject to the minimum charges in Rule 5-164. Materials or equipment purchased or leased for provided services will be charged at actual cost plus thirty-five percent (35%) for procurement and sales tax will be assessed whenever required by law. 

Upon request, the GPA may facilitate third-party vendor service if reasonably available and not in conflict with services provided by the GPA. The GPA will not supervise, or otherwise direct, any third-party vendor in the performance of their services, nor will the GPA accept any liability on behalf of such vendor. Charges for third-party vendors will be assessed at cost plus thirty-five percent (35%), when the GPA is responsible for the said vendor’s charges, unless otherwise indicated.