If a state agency desires to use the comptroller's services for a delegated or exempt purchase, a written request shall be made in a manner and form determined by the director and containing information the director deems relevant to the purchase and processing of the request. Such service shall be by cost recovery and the director shall determine and include all relevant factors related to providing the service on a cost basis. In no event shall non-delegated purchases be placed in jeopardy by the processing of delegated or exempt purchases.
34 Tex. Admin. Code § 20.83