Consent ordinarily to be obtained.

Save as otherwise provided in this Act or the rules or the regulations made thereunder, no land or building shall be entered without the consent of the occupier, or if there is no occupier, of the owner thereof, and no such entry shall be made without giving such occupier or owner, as the case may be, not less than twenty four hours' notice, in writing, of the intention to make such entry: Provided that no such notice shall be necessary if the Municipality considers, for reasons to be recorded in writing, that there is immediate urgency for such entry and the service of a notice, in writing, may defeat its purpose.