The "Regulation For Diving Operations" identifies the duties of employers,constructors and owners to give a notice of a diving operation prior to commencement of the operation. It requires that the constructor of a project where a diving operation is to take place and the employer and the owner associated with a diving operation ensure that the Ministry is given notice of the diving operation in writing before the diving operation begins. Alternatively, it allows for the notice be given orally before the diving operation begins and in writing within 30 days after the day on which the diving operation begins. The attached file gives the updates on areas and phone numbers when operating in Ontario waters.