Section 4

any house or flat is provided with a household shelter under this Act; or

any part of any building consists of a storey shelter provided under this Act,the owner or occupier of the house, flat, building or part thereof —

must not carry out or permit another person to carry out therein, any repair or alteration, or anything else, which is likely to damage or otherwise impair the efficient use of the household or storey shelter as such, except with the written permission of the Commissioner and subject to such conditions as the Commissioner thinks fit;

must maintain the household or storey shelter in accordance with the regulations and such other directions as the Commissioner may give from time to time; and

must carry out such works for the maintenance, alteration or improvement of the household or storey shelter or for the installation of any equipment in the household or storey shelter as the Commissioner may, from time to time, by writing require.