19. Once the construction of the authorised works is complete, the City Council or an officer or manager authorised by the City Council may, for harbour purposes, lease or grant the use or occupation of, or any right or interest in or over, any lands, works, buildings, equipment or other property forming part of the Mile End Quay undertaking for such period or periods and on such terms and conditions as shall be agreed between the City Council or the officer or manager and the person taking the same.