No person shall keep a common lodging-house, or receive a lodger therein, unless he is registered as the keeper thereof under this Part of this Act:
Provided that—
a person who immediately before the commencement of this Act was registered under any enactment repealed by this Act as the keeper of a common lodging-house shall for a period of three months after the commencement of this Act be deemed to be registered under this Act as the keeper of that house; and
when the registered keeper of a common lodging-house dies, his widow or any other member of his family may for a period not exceeding four weeks from his death, or such longer period as the local authority may sanction, keep the house as a common lodging-house without being registered as the keeper thereof.