Does anyone know how G to A++++ energy labels are assigned for residential properties in the Netherlands?

for instance I understand that between 0 to 50 kWh/m2/yr. of energy consumption will result in an energy label of A+++. [1] does 0-50 kWh/m2/yr. concern all or only fossil based site consumption? and [2] does this apply to a 40m2 apartment as well as a 1200m2 communal living space? does dwelling size make any difference to calculated energy label?