(a) Notwithstanding any charter provision to the contrary, the governing body of every municipality shall by ordinance fix or cause to be fixed the salary or compensation of every municipal officer and employee; provided, that the salary of any officer shall not be increased or diminished during his term.
(b) The governing body of every municipality shall have plenary power and authority to provide by ordinance for the allowance of time off of officers and employees with pay for vacations and illness and for personnel management incentives, as additional consideration for their services and employment.