Although there is mention of the minimum 40 % canopy cover and 12 native tree species per hectare in the criterion, it states that farms can meet those parameters OR have 15 % nativevegetation cover.
Brazil's «Forest Code» law — first passed in 1965, but revised many times then replaced in 2012 — required landowners to maintain a minimum percentage of their property under nativevegetation, typically 80 % in the Amazon.