The conditional use plan shall provide for the establishment of no less than 80% of the required number of parking spaces as specified in Article V, Use Definitions and Regulations, herein for the use or uses proposed. Provided, however, that for manufacturing facilities of at least 100,000 square feet combined with a warehousing facility of at least 100,000 square feet, the conditional use plan shall provide for the establishment of no less than 50% of the parking requirement, provided, further, that a minimum of 1.1 spaces per employee on the largest shift and one space for each vehicle normally stored on the premises is constructed and not reserved.