172. Despite the first paragraph of section 31.81 of the Act, the period of validity of an authorization issued for the withdrawal of water for the operation of an aquaculture site on land is 15 years when, for each ton of annual production, the operation(1) targets an annual discharge of phosphorous, in its effluents, of 4.2 kg or less; and
(2) withdraws a volume of water of 10,000 litres per hour or less.