55 Pa. Stat. § 686
The commission may employ such professional, technical and clerical staff and engage the services of consultants, as it deems necessary to carry out its responsibilities under this act. Further, the Department of Transportation shall provide necessary office space and administrative support for the commission. Whenever possible, the commission shall utilize the services and expertise of existing personnel and staff of State Government and to this end the Governor is hereby directed to make such personnel and staff available to the commission to the fullest extent commensurate with the performance of their other duties. The commission shall reimburse state agencies, including the Department of Transportation, for any expenses incurred in providing to the commission the services as required by this act.
55 P.S. § 686