Cal. Penal Code § 1463.007
(b) Once debt becomes delinquent, it continues to be delinquent and may be subject to collection by a comprehensive collection program. Debt is delinquent and subject to collection by a comprehensive collection program if any of the following conditions is met:
(c) For the purposes of this section, a “comprehensive collection program” is a separate and distinct revenue collection activity that meets each of the following criteria:
(3) The program engages in each of the following activities:
(4) The program engages in at least five of the following activities: