(a) Nothing in this part shall preclude the Department of Human Resources from providing by rule for a system of adjusting employee grievances which shall be administered within the departments before recourse to any remedy provided in this part.
(b) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Section 3517.5, the memorandum of understanding shall be controlling without further legislative action, except that if such provisions of a memorandum of understanding require the expenditure of funds, the provisions shall not become effective unless approved by the Legislature in the annual Budget Act.