Section 21.3. Saturday banking hours

(a) The term ‘‘banking day’’ when used in this section means that part of any day on which a bank is open to the public for carrying on substantially all of its banking functions.

(b) All banks engaged in or contemplating Saturday banking hours must determine that accounting procedures are performed in accordance with the provisions of the Uniform Commercial Code (12A P. S. § § 1-101—10-104).

(c) For purposes of deferred posting and return of items, a bank must perform its accounting procedures prior to midnight of its next banking day for the day on which items are received.

(d) In the instance of banks who no longer perform their own bookkeeping and who have adopted Saturday banking hours, the following rules apply:

(1) Transactions of Friday must be posted at the computer center and returned to the bank by Saturday morning.

(2) Transactions of Friday night and Saturday will have to be sent to the computer center Saturday night for return on Monday morning.

The provisions of this § 21.3 adopted by Secretary’s Letter ‘‘F,’’ dated March 14, 1966.