(a) In any case where a complaint is filed, the DOT decisionmaker shall issue an order dismissing the complaint, disapproving the contract, or taking such other action as may be appropriate. Any such order shall be issued not later than ten (10) days prior to the effective date of the contract.

(b) In cases where no complaint is filed, the DOT decisionmaker may issue a letter of notification to all persons upon whom the contract was served indicating that the Department does not intend to disapprove the contract.

(c) Unless the DOT decisionmaker disapproves the contract not later than ten (10) days prior to its effective date, the contract automatically becomes effective.