to deposit in any escrow account which may be established in connection with such loan for the purpose of assuring payment of taxes, insurance premiums, or other charges with respect to the property, in connection with the settlement, an aggregate sum (for such purpose) in excess of a sum that will be sufficient to pay such taxes, insurance premiums and other charges attributable to the period beginning on the last date on which each such charge would have been paid under the normal lending practice of the lender and local custom, provided that the selection of each such date constitutes prudent lending practice, and ending on the due date of its first full installment payment under the mortgage, plus one-sixth of the estimated total amount of such taxes, insurance premiums and other charges to be paid on dates, as provided above, during the ensuing twelve-month period; or

to deposit in any such escrow account in any month beginning with the first full installment payment under the mortgage a sum (for the purpose of assuring payment of taxes, insurance premiums and other charges with respect to the property) in excess of the sum of (A) one-twelfth of the total amount of the estimated taxes, insurance premiums and other charges which are reasonably anticipated to be paid on dates during the ensuing twelve months which dates are in accordance with the normal lending practice of the lender and local custom, provided that the selection of each such date constitutes prudent lending practice, plus (B) such amount as is necessary to maintain an additional balance in such escrow account not to exceed one-sixth of the estimated total amount of such taxes, insurance premiums and other charges to be paid on dates, as provided above, during the ensuing twelve-month period: Provided, however, That in the event the lender determines there will be or is a deficiency he shall not be prohibited from requiring additional monthly deposits in such escrow account to avoid or eliminate such deficiency.