For depollution attestations issued before 1 January 2014, the amount of the duties exigible for mine tailings deposited in an accumulation area is set
(1) at 33% of the lesser amount between the amount calculated in accordance with Schedule II for 2014 and $1,000,000;
(2) at 66% of the lesser amount between the amount calculated in accordance with Schedule II for 2015 and $1,000,000;
(3) at 100% of the lesser amount between the amount calculated in accordance with Schedule II for subsequent years and $1,000,000.
For the same attestations, the total of the amounts of duties exigible for industrial discharges into water and the atmosphere and for mine tailings deposited in an accumulation area calculated in accordance with Schedules I and II may not exceed $1,000,000 (O.C. 652-2013, s. 6).