California Code, Public Utilities Code - PUC § 130660

(a) Board members or their staff are prohibited from soliciting or accepting any gift from a person or entity, including the person's or entity's lobbyists, that has submitted a proposal or bid for an MTA contract award during the period beginning on the date that the proposal or bid is submitted and ending 12 months after the final decision on the contract award.

(b) Board members and their staff shall exercise caution in accepting any gift from a person or entity that is considering submitting a proposal or bid for an MTA contract award.

(c) Board members shall not accept gifts aggregating more than ten dollars ($10) in a calendar month from a current MTA contractor, registered lobbyist, lobbying firm, or lobbyist employer.