Effective August 1, 1970, Commissioner's Rules numbers 41 through 51, dealing with the purchase of investment securities, were issued under authority granted the Commissioner in Sections 19 and 154 of the Banking Code of 1969.

Your attention is directed to Rule 45 which states: "A bank shall maintain in its credit files information adequate to demonstrate that it has exercised prudence in making the determination and carrying out the transactions described in Rule 42."

It is expected that all banks will comply with the above stated rule, and credit files containing adequate information will be maintained and available for examination by representatives of this Bureau at all times.

Signed:	Robert P. Briggs, Commissioner
Dated:	October 20, 1971