(1) Any destruction of official public records shall be pursuant to a schedule approved under RCW 40.14.050. Official public records shall not be destroyed unless:

(a) Except as provided under RCW 40.14.070(2)(b), the records are six or more years old;

(b) The department of origin of the records has made a satisfactory showing to the state records committee that the retention of the records for a minimum of six years is both unnecessary and uneconomical, particularly if lesser federal retention periods for records generated by the state under federal programs have been established; or

(c) The originals of official public records less than six years old have been copied or reproduced by any photographic or other process approved by the state archivist which accurately reproduces or forms a durable medium for so reproducing the original.

(2) Any lesser term of retention than six years must have the additional approval of the director of financial management, the state auditor and the attorney general, except when records have federal retention guidelines the state records committee may adjust the retention period accordingly. An automatic reduction of retention periods from seven to six years for official public records on record retention schedules existing on June 10, 1982, shall not be made, but the same shall be reviewed individually by the state records committee for approval or disapproval of the change to a retention period of six years.

Recommendations for the destruction or disposition of office files and memoranda shall be submitted to the records committee upon approved forms prepared by the records officer of the agency concerned and the archivist. The committee shall determine the period of time that any office file or memorandum shall be preserved and may authorize the division of archives and records management to arrange for its destruction or disposition.