CA Gov't Code Section 16367.8

Any advisory agency, commission, or other entity established by any city, county, or special district relative to the application for or use of federal block grant funds shall include in its membership older persons, as defined by Section 9103 of the Welfare and Institutions Code, in such numbers as to proportionately reflect in the membership of the agency, commission, or other entity, as nearly as possible, the population of persons 60 years of age or older residing within the jurisdiction of the city, county, or special district as indicated in the most recent national decennial census. The older persons appointed pursuant to this section shall be drawn, where possible, from the membership of existing agencies, commissions, or other entities established by the city, county, or special district relative to the subject of aging.