22. Every loan is repayable on the amortization basis and the terms and conditions prescribed by regulation, taking into account, where applicable, the normal life of the property constituting a purpose for which the loan is granted, within a period computed from the date on which the first payment of capital is due, but of not over thirty years from the date of the deed of loan in the case of a long-term loan, not over fifteen years from the date of the payment in the case of a medium-term loan, and not over five years from the date of the payment in the case of a short-term loan.