Health & Saf. Code, § 39603

(a) The state board may do both of the following:

(1) Contract for technical advisory services and other services as may be necessary for the performance of its powers and duties.

(2) Appoint advisory groups and committees as it requires. Members of committees or advisory groups shall receive one hundred dollars ($100) per day for each day they attend a meeting of the state board or meet pursuant to a request of the state board, plus actual and necessary travel expenses incurred while performing their duties.

(b) In appointing advisory groups and committees, the state board may appoint a number of persons qualified in various fields and disciplines. Persons appointed shall be kept informed of the issues before the state board and the work pending before the state board. When the state board desires the advice, in connection with a particular problem or problems, of any person so appointed, the chairperson of the state board may select that person to serve as a member of a working group or committee for the purpose of providing the advice. After the working group or committee has given its advice to the state board, it shall cease to function as a working group or committee. The financial remuneration specified in paragraph (2) of subdivision (a) shall be available to persons only during the time they are serving as members of a working group or committee at the request of the state board.