When the individual retirement savings plan gives rise to the opening of an associated cash account, the manager shall credit the cash account with the payments made by the account holder, the amount of cash proceeds from the securities held in the associated securities account, repayments and the amount of sales of these securities. The cash account is debited with the amount of subscriptions or acquisitions of securities held in the associated securities account and the amount of cash withdrawals. Management fees may also be debited from the cash account. This account may not have a debit balance.