(a) Conditions for stock transfer. Under 12 U.S.C. 52, a national bank may impose conditions upon the transfer of its stock reasonably calculated to simplify the work of the bank with respect to stock transfers, voting at shareholders' meetings, and related matters and to protect it against fraudulent transfers.

(b) Record dates. A national bank may close its stock records for a reasonable period to ascertain shareholders for voting purposes. The board of directors may fix a record date for determining the shareholders entitled to notice of, and to vote at, any meeting of shareholders. The record date should be in reasonable proximity to the date that notice is given to the shareholders of the meeting.