An application for a building permit for alteration, removal, or demolition of a building or structure in the Central Business District shall be accompanied by all applications(s) required for any improvement to be erected thereafter, and, except in the case of a demolition of an unsafe building under the Building Code, the Building Inspector may not take action to approve an application for a building permit for alteration, removal, or demolition unless and until all said applications(s) required for any improvement to be erected thereafter have been granted.