California Code, Government Code - GOV § 65067.2

County or city legislative bodies, planning commissions, and all other county or city planning agencies within the district, and agencies, organizations and instrumentalities of the state and federal government within the district, and private planning consultants acting within the district, may submit proposals for any master or general plan, the elements of any master or general plan, any other plan, map, report, capital improvement program, proposed bond issue, or any other report or document or amendments or revisions thereto, prior to their adoption, to the regional planning board for its advice thereon, which advice the board shall give whenever in its opinion it is reasonably possible for it to do so.  Such advice shall consist of a report as to the conformance of such proposals to the regional plan, the possible effect of such proposals on other portions of the region, and any other matters which in the judgment of the board may be of assistance to the body requesting such advice.