In approving and maintaining lists of adopted instructional materials, the state board shall, pursuant to subdivision (e) of Section 60200, do any one or more of the following, when applicable:
(a) Retain any instructional materials from a previous list and biennially make any adjustment in prices based on information provided pursuant to Section 60223.
(b) Delete from the lists any instructional material which it determines is obsolete pursuant to Section 60500, or which received no order from any district board during the previous two years.
(c) Add instructional materials not previously submitted for adoption, or materials previously submitted which have been revised to comply with any recommendations of the state board.