21(1)Upon written demand being made by the Minister, any costs incurred by the Minister while taking action under section 18 or 18.1, including the costs of all persons, materials and equipment employed and the costs of ameliorating any adverse effect of the release of a contaminant, of restoring any land, premises or personal property under subsection 19(2) or of repairing any other damage whatsoever done when taking the action, shall be the liability of and paid by all persons