Cal. Wat. Code § 190
Whenever the State of California is specifically invited by federal law to participate in any interstate commission to plan for the regional development of water and related resources, the Governor shall appoint each California member of such commission. The appointment of each such member shall be subject to confirmation by the Senate, and the member appointed shall serve at the pleasure of the Governor.
The provisions of this section shall also apply to the Western States Water Council established by the Western Governors' Conference at its meeting in Portland, Oregon, in June 1965.
Each member appointed by the Governor to the Western States Water Council shall receive the actual and necessary expenses incurred by him in the performance of his duties as a member, including travel expenses. Additionally, each such member, except persons who are officers or employees of the state, shall receive a compensation of twenty-five dollars ($25) for each day such member is engaged in the performance of his duties as a member. Such expenses and compensation shall be paid from the budget of the Department of Water Resources.
The provisions of this section do not in any manner affect the provisions of Section 123 which provide for state administration of interstate compacts relative to the distribution and use of the waters of any interstate streams or bodies of water.
Ca. Water Code § 190