(1) There will be two classes of depository libraries in Washington. These will be full and partial. Full depositories shall receive copies of all state publications for distribution by the state library. Partial depositories shall receive at least a core of general interest publications deemed essential to the public interest. Any other library in the state may request specific documents and, if it is at all possible, the request will be filled.

(2) Any library designated as a depository shall meet the conditions specified in the following section:

(a) Provide space to house the publications in an approved manner with adequate provisions for expansion. State publications do not need to be maintained in a separate collection unless the receiving library prefers to do so. Housing in a vertical file rather than on shelves is acceptable for appropriate pamphlet-type materials.

(b) Provide an orderly, systematic recording of receipt of the documents.

(c) Process and shelve all state publications within thirty days after receipt of the material.

(d) Provide a professionally trained librarian to render satisfactory service without charge to qualified patrons in the use of such publications. This librarian need not spend full time on state publications.

(e) Dispose of publications only with permission of the state librarian. The state librarian shall establish criteria for disposal schedules for items which need not be retained permanently.

(f) Accept and maintain all publications received as depository documents.

(g) Library rules must assure that the documents are available for public use and circulation, unless for some unusual reason it becomes necessary to restrict use.

(3) There will be at least twelve full depositories in the state. Additional depositories will be established as advisable to provide adequate public access to Washington state publications.

(4) The state library shall ensure that the rules, regulations and standards are maintained.