17. A holder of a depollution attestation shall send the Minister a written notice of any derogation from the provisions of an element referred to in section 31.13 of the Act and contained in the depollution attestation, and of the reasons for the derogation. The holder shall so notify the Minister within 30 days of learning of the event that gave rise to the derogation.
The notice shall also specify the measures taken or planned by the holder to reduce or eliminate the effects of the event that gave rise to the derogation.
Notwithstanding the foregoing, this section does not apply where the event that gave rise to the derogation constitutes an accidental occurrence of a contaminant in the environment referred to in subparagraph 3 of the first paragraph of section 31.23 of the Act or where the event is an infringement of a contaminant discharge standard for which the holder must keep and conserve a record in accordance with section 14.