The Director of Human Resources Management shall develop personnel procedures establishing the effective dates of all salary rate changes authorized pursuant to any of the provisions of this Division. Any change in an employee's salary rate, as authorized pursuant to any of the provisions of this Subtitle, shall not be paid to the employee until said change has been approved by the Director of Human Resources Management. In no event shall any salary rate change authorized pursuant to any of the provisions of this Subtitle be made retroactive by the Director of Human Resources Management unless otherwise required or authorized by law. CR-18-1995 provided that all salary rate adjustments may be made effective as of the first day of the pay period in which the adjustment occurs.