. . . "See WAC 208-660-410, Trust accounting.(3) How long must I keep my books and records to comply with the act?(a) You must keep the books, accounts, records, papers, documents, files, and other information relating to the mortgage broker operation for a minimum of three years.(b) You must keep the mortgage transaction documents described in subsection (1)(a) of this section for a minimum of three yea" . . .