240.3. The royalty is payable by the operator and remitted to the Minister within the first 25 days of each month in the case of mineral substances contemplated in subparagraph 1 of the first paragraph of section 240.1, or on the dates fixed by section 46 of the Mining Duties Act (chapter D-15) in the case of mineral substances contemplated in subparagraph 2 of the said paragraph.