Requests for waivers. The applicant may request that one or more of the submission requirements be waived, in which event the agency or its authorized committee shall grant or deny the request within 45 days. In the event that some items may not be completed on the application or plats for the purpose of computing the within fees, the applicant shall supply in writing to the Planning Board or Board of Adjustment, as the case may be, a written statement signed by the applicant or his attorney indicating why the details cannot be placed on the plats, and the plats shall not be considered complete until the Planning Board or the Board of Adjustment has received the plans to ascertain whether the omitted details could be included for the purpose of computing the within fees.