Except as expressly provided in this subtitle, the power of the Secretary over plans, proposals, and projects of units in the Department does not include the power to disapprove or modify any regulation, decision, or determination that the Commission makes under authority specifically delegated by law to the Commission. The power of the Secretary to transfer, by rule, regulation, or written directive, any staff, functions, or funds of units in the Department does not apply to any staff, function, or funds of the Commission. The Secretary may assess an administrative charge, consistent with the indirect cost charge assessed to federal grants, to fund services provided to the Commission by the Executive Branch. The power of the Secretary over the procurement procedure for units in the Department does not apply to the procurement procedure for the Commission. Subject to the provisions of paragraph (1) of this subsection, any procurement for services to be performed or for supplies to be delivered to the Commission is subject to the purposes and requirements of the State Finance and Procurement Article.