4. Members of the service to spray or inspect all premises
It shall be the duty of members of the Service to spray all premises and their contents when ordered by the Chief Officer or any medical officer, and to inspect all premises and all articles likely to contain water found in or upon such premises between the hours of 7:00 a.m. and 6:00 p.m., or in the case of business premises, during such hours as the business is in progress.