act upon debit requests received from visa pertaining to the above settlement account , subject to availability of funds

Выражение встречается в следующем контексте:

By receipt of a copy of the Settlement FundsTransfer Instruction Forms from the participating Member, or other bank-required paperwork, the above-mentioned institution confirms that a) the Member's account designated for Visa settlement is open, and b)that the Settlement Bank is prepared to accept credits and ACT UPON DEBIT REQUESTS RECEIVED FROM VISA PERTAINING TO THE ABOVE SETTLEMENT ACCOUNT, SUBJECT TO AVAILABILITY OF FUNDS

Мой вариант перевода:
И ДЕЙСТВОВАТЬ В СООТВЕТСТВИИ С ЗАПРОСАМИ ДЕБЕТОВАНИЯ, ПОЛУЧЕННЫМИ ОТ VISA ОТНОСИТЕЛЬНО ВЫШЕУКАЗАННОГО РАСЧЕТНОГО СЧЕТА В ЗАВИСИМОСТИ ОТ НАЛИЧИЯ СРЕДСТВ.

Заранее спасибо