When appropriated by the Legislature, the department may receive and expend all funds made available by the federal government, the state, its political subdivisions, and other sources, and, within the limitation of the funds made available, shall act as an agent for the transmittal of the funds for services through the regional centers. The department may use any funds received under Article 5 (commencing with Section 123800) of Chapter 3 of Part 2 of Division 106 of the Health and Safety Code for the purposes of this division.