California Code, Streets and Highways Code - SHC § 27566

(a) In its role as administrator of the automatic vehicle identification system described in Section 27565, the Bay Area Toll Authority shall provide vehicle owners who seek to obtain an account the option of opening and maintaining an account with United States currency or check.  That option shall also allow a customer to obtain an account without providing his or her name or address.

(b) The Bay Area Toll Authority shall inform the public about the option to obtain a cash-based account for the automatic vehicle identification system on its Internet Web site and in promotional materials.

(c) The Bay Area Toll Authority may provide a person with the option of making a payment with United States currency to replenish his or her vehicle identification system account at the toll plaza administration building associated with each of the state-owned toll bridges located within the geographic jurisdiction of the Metropolitan Transportation Commission.

(d) The Bay Area Toll Authority shall make a good faith effort to encourage commercial retailers that sell transponders for the automatic vehicle identification system to enable a person to replenish his or her account at the retail location with a variety of payment methods, including, but not limited to, United States currency.