(a) A contractor must develop, maintain, and comply with written policies and procedures for the retention and destruction of all written, electronic, and digital documentation that pertains to all program participants, including:(1) case notes, case content, and case files;(2) staff-to-staff communications; and(3) documentation required by other funders.(b) Length of retention must be at least 3 years and 90 calendar days after the date of the last service.