Credit for purposes of lane placement shall be granted to teachers for participation in subject-related workshops or training sessions which are conducted by industry and other approved organizations and which have been approved in advance by the BOARD. Requests for such approval shall be given in writing to the Department of Instruction Services and submitted sufficiently far in advance to permit appropriate investigations by the BOARD. A reviewing committee set up by the BOARD shall approve or disapprove promotional credits for particular training sessions or educational programs which do not bear university credit and shall determine credit hour equivalencies of such attendance. (This applies to all teachers.)