(2) Criteria for determining required parking spaces.

(a) In computing the number of the above required parking spaces, the following rules shall govern:

[1] Where fractional spaces result, the required number shall be construed to be the nearest whole number.

[2] The parking space requirements for a use not specifically mentioned herein shall be the same as required for a use of similar nature as determined by the municipal agency based upon that use enumerated herein which is most similar to the proposed use. If there is no use enumerated herein having sufficient similarity to the use proposed to enable the municipal agency to establish rational parking requirements, the municipal agency may, in its discretion, direct the applicant to furnish the municipal agency with such data as may be necessary to enable the municipal agency to establish rational parking requirements.

(b) Nothing in the above requirements shall be construed to prevent the joint use of off-street parking facilities by two or more uses on the same site, provided that the total of such spaces shall not be less than the sum of the requirements for various individual uses computed separately by the above requirements.

(c) No part of off-street parking required by a structure or use shall be included as part of an off-street parking requirement of another use.