90. A holder of a management permit shall ensure that the forest management sector where he harvests trees by applying silvicultural treatments is regenerated with commercial species.
Not later than 4 years after that harvest, the permit holder shall ensure that such regeneration is being established with at least the same distribution coefficient as the coefficient existing before the cutting of those species.
That coefficient is the ratio, expressed as a percentage, of the number of parcels of land covering that forest management sector that contain at least 1 stump or tree whose diameter at its base is 10 cm or more for the commercial species listed in Part A of Schedule 2 and 6 cm or more for those listed in Part B of that Schedule.
The parcels of land referred to in the third paragraph are 4 m2 for softwood species in Part A of Schedule 2, 9 m2 for hardwood species in Part A of that Schedule and 25 m2 for the species in Part B of that Schedule.
For the purposes of this section, the size of the parcel is established by taking into account the dominant species before the cutting of the forest management sector.