The Planning Board or Zoning Board of Adjustment may waive up to 50% of the required number of parking space for all nonresidential uses based upon evidence provided by applicant that owing to the nature of use operation, management, employment records or other independent survey shows the calculated number of parking spaces is not required to meet the needs of the applicant. In such case, an area shall be reserved that can readily be converted to off-street parking in accordance with this chapter.