Amendment of the Zoning Map shall not constitute authorization to develop in the district. Such authorization, after a planned development district has been established, shall require that the applicant submit to the Zoning Board of Appeals such further plans and specifications, supporting documents and data as shall be required by the Board and shall specify on the plans and in writing the building types and layout, setbacks, off-street parking and loading, ingress and egress, signs, existing and proposed amenities, screening, planting and ornamental features and the plan or arrangements for development the area of in stages or in its entirety.