A participating local district may provide, by filing with the board a duly certified copy of its action, an additional benefit for employees under special plans who transfer to positions not under special plans. The benefits under subsection 2, paragraph A are not applicable to employees of participating local districts which have not adopted the provisions of section 18453, subsection 10 or 11. [RR 2001, c. 2, Pt. A, §12 (COR).]