The Planning Commission shall, within 30 days of receipt of said plan, review and submit comments and suggestions to the Zoning Hearing Board which, after a public hearing, approves or disapproves the proposed use. If disapproved, the reasons for disapproval shall be clearly stated on one copy of the submission and returned to the applicant. The Zoning Officer shall deny a zoning permit for the proposed development until written approval of the Zoning Hearing Board is obtained. Approval may be made conditional upon the applicant's adoption of specified changes in the submission.