At the request of the developer, the Planning Board shall grant an informal review of a concept plan for development for which the developer intends to prepare and submit an application for development. The amount of any fees for such an informal review shall be a credit towards fees for review of the application for development pursuant to subsection 34-14.1e. The developer shall not be bound by any concept plan for which review is requested, and the Planning Board shall not be bound by any such review. Informal review shall not be available for any concept plan which would require relief from the Planning Board acting as the Board of Adjustment pursuant to N.J.S.A. 40:55D-70(d).