47. The age of each cartographic stratum in the baseline scenario and project scenario must be defined(1) in the case of the baseline scenario for a lot or part of a lot assigned to non-forestry purposes, based on the merchantable volume calculated in accordance with section 45 in relation to the growth curve selected to represent the change in the merchantable volume for a cartographic stratum; or
(2) in the case of the baseline scenario for a lot or part of a lot assigned to forestry purposes, based on the measurements of dominant height, basal area and number of stems in relation to the growth curve selected to represent the change in the merchantable volume for a cartographic stratum; and
(3) in the case of the project scenario, based on the year of the planting of seedlings or sowing of seeds.