91. Where the space occupied by a holder of a management permit for public utility works is located south of the 52nd parallel, the permit holder shall, within 2 years following the date of the end of such use, ensure that the space he occupied is regenerated with commercial species and ensure that the distribution coefficient of such regeneration, established in accordance with section 90, is at least equal to the coefficient existing before the cutting of the species over that area.
The permit holder shall also ensure that the coefficient is maintained 8 years after the area is abandoned. Where the work is carried out north of the 52nd parallel, the permit holder shall ensure that the space occupied for those purposes is regenerated with species adapted to the conditions of that space as soon as it is abandoned.