California Code, Government Code - GOV § 65089.11

(a) The City/County Association of Governments of San Mateo County, which has been formed by the resolutions of the board of supervisors within San Mateo County and a majority of the city councils within the county that represent a majority of the population in the incorporated area of San Mateo County, may impose a fee of up to four dollars ($4) on motor vehicles registered within San Mateo County.  The City/County Association of Governments of San Mateo County may impose the fee only if the board of the association adopts a resolution providing for both the fee and a corresponding program for the management of traffic congestion and stormwater pollution within San Mateo County as set forth in Sections 65089.12 to 65089.15, inclusive.  Adoption by the board requires a vote of approval by board members representing two-thirds of the population of San Mateo County.

(b) A fee imposed pursuant to this section shall not become operative until July 1, 2005, pursuant to the resolution adopted by the board in subdivision (a).

(c) The City/County Association of Governments of San Mateo County may reauthorize the fee established under subdivision (a) pursuant to the same conditions required in that subdivision for a period of four years and the fee shall terminate on January 1, 2013, unless reauthorized by the Legislature.