The secretary shall accept the recommendations of the advisory board pertaining to subdivision (b) of Section 14611 if he or she finds them to be practicable and in the interests of the fertilizer industry and the public. If the secretary does not accept the recommendations of the advisory board, or any part thereof, the secretary shall provide the board with a written statement within 15 working days of making his or her decision stating the reasons for not accepting the recommendations, or any part thereof.