§ 11. Old dwellings. Except as required in section nine and articles
three and four, nothing in this chapter shall be construed to require
any change in the construction, use, or occupancy of any old or other
existing multiple dwelling occupied as such on July first, nineteen
hundred fifty-two, which on such date is in compliance with the
provisions of all statutes, local laws, ordinances, rules and
regulations applicable thereto.