(5) The landlord seeks in good faith to recover possession for the immediate purpose of making alterations or renovations which cannot safely or reasonably be accomplished while the accommodation is occupied or for the immediate purpose of demolishing the accommodation and replacing it with new construction, provided that the plans for the alteration or new construction have been filed with and approved by the Commissioner of the District of Columbia or his appropriate agent. When the landlord seeks to recover repossession under this subsection for the purpose of initiating substantial rehabilitation of the accommodation, he shall be subject to the provisions of Section 12(b) of this regulation. If, however, the landlord seeks to recover possession in order to make repairs which are necessary to bring the premises into compliance with District of Columbia Housing Regulations, the tenant shall have an absolute right to repossession immediately upon completion of the repairs, at the same rent and under the same obligations; or