(3)The State Government may make rules to regulate the discharge by officers of the Motor Vehicles Department of their functions and in particular and without prejudice to the generality of the foregoing power to prescribe the uniform to be worn by them, the authorities to which they shall be subordinate, the duties to be performed by them, the powers (including the powers exercisable by police officers under this Act) to be exercised by them, and the conditions governing the exercise of such powers.