Where the financial assistance gives rise to the drawing up of an agreement with the beneficiary, and unless otherwise provided for in these general regulations, the terms of payment and, where applicable, repayment of the financial assistance, as well as the circumstances in which it gives rise to repayment, are laid down in the agreement. The agreement may also provide for a derogation from the time limit for lapsing the decision conditioning payment of the aid provided for in article 121-7.