California Code, Government Code - GOV § 86107

(a) If any change occurs in any of the information contained in a registration statement, an appropriate amendment shall be filed both by online or electronic means and physically, submitting the original one copy of the amendment, in paper format, with the Secretary of State within 20 days after the change.  However, if the change includes the name of a person by whom a lobbying firm is retained, the registration statement of the lobbying firm shall be amended and filed to show that change prior to the lobbying firm's attempting to influence any legislative or administrative action on behalf of that person.  Lobbying firms and lobbyist employers that, during a regular session of the Legislature, cease all activity that required registration shall file a notice of termination within 20 days after the cessation.  Lobbying firms and lobbyist employers that, at the close of a regular session of the Legislature, cease all activity that required registration are not required to file a notice of termination.

(b) If any change occurs in any of the information contained in a lobbyist certification or if a lobbyist terminates all activity that required the certification, the lobbyist shall submit an amended certification or notice of termination to the lobbyist's lobbying firm or lobbyist employer for filing with the Secretary of State within the time limits specified in subdivision (a).  A lobbyist who, at the close of a regular session of the Legislature, ceases all activity that required certification is not required to file a notice of termination.

(c) Lobbyists and lobbying firms are subject to Section 86203 for the earlier of six months after filing a notice of termination or six months after the close of a regular session of the Legislature at the close of which the lobbyist or lobbying firm ceased all activity that required certification or registration.