Referral to Planning Board. The Board of Appeals may refer to the Planning Board all applications for special uses and any other applications or appeals which, in the opinion of the Board of Appeals, require review by the Planning Board. In its review, the Planning Board shall, in the case of special uses, determine compliance with the standards set forth in this chapter and, in all cases, shall report, in writing, its findings and recommendations to the Board of Appeals within 30 days.