Employers liable for the apprenticeship tax pay the balance referred to in II of article L. 6241-2 on the basis of the same base as that of the main part, collected in the year preceding that in which the balance is due. The payments mentioned in 1° and 2° of article L. 6241-4 are deducted from this fraction of the apprenticeship tax, at the employer’s discretion, either alternatively or cumulatively, in accordance with the procedures set out in these same provisions.