In the interpretation of this chapter, the following rules shall govern:
(a) Parking spaces for other permitted or conditional uses not listed in this chapter shall be determined by the Building and Zoning Appeals Board upon an appeal from a decision of the Zoning Inspector.
(b) Fractional numbers shall be increased to the next whole number.
(c) When a reason for parking demand is unusually low, then the parking space provisions cited above may be reduced proportionately by the Board upon an appeal from a decision of the Zoning Inspector.