In all Residence Districts, and in C2, C6 or C7 Districts, the Board of Standards and Appeals may permit riding academies or stables operated as a recreation service, for a term not to exceed five years, provided that the following findings are made:
(a) that such use is so located as not to impair the essential character of the surrounding area;
(b) that adequate horseback riding facilities are available on the same zoning lot or within 600 feet of such zoning lot;
(c) that the location and operation of such use will not be such as to result in any serious traffic hazards or conflicts on nearby streets; and
(d) that in Residence Districts, no stables or riding areas are located within 40 feet of any side or rear lot line.
The Board may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area, including requirements for sanitation, for screening, or for landscaping.