(1) Any bank doing business in this state may remain closed on any day on which, by reason of an occasion of national mourning or rejoicing or national or local emergency affecting the community in which such bank is located, the governor shall by proclamation request the people of the state or of said community to close their places of business.

(2) If the banking board is of the opinion that an emergency exists affecting banks located in the state or in any part thereof, it may authorize banks located in the area affected by the emergency to close any or all of their offices, and it shall make public announcement of such authorization. In addition, if the banking board is of the opinion that an emergency exists that affects a particular bank or a particular office thereof, but not banks located in the area generally, it may authorize the particular bank or office so affected to close. As used in this subsection (2), the word "emergency" shall include any condition that may interfere with the conduct of the normal operations of, or the transportation of employees to or from, a bank or one or more offices thereof, or that poses an existing or imminent threat to the safety or security of bank personnel or property, including without limitation conditions arising by reason of fire, flood, windstorm, snowstorm, or other casualty, interruption of transportation or power facilities, war or other enemy action, riots, civil commotion, or other acts of lawlessness or violence.

(3) If the officers of a bank are of the opinion that conditions exist that pose an existing or imminent threat to the safety or security of bank personnel or property generally or at any one or more offices thereof, they may close the bank or the office affected by such threat, as the case may be, irrespective of whether the governor or the banking board has acted under this section. As used in this section, the word "officers" shall mean the person designated by the board of directors, board of trustees, or other governing body of a bank to act for the bank in carrying out the provisions of this section or, in the absence of any such designation or the officer so designated, the president or any other officer currently in charge of the operations of the bank or of the office in question. A bank closing an office pursuant to this section shall give as prompt notice to the banking board of such action as conditions permit.

(4) Any bank or office thereof that is closed by action of the banking board under this section may remain closed until it declares that the emergency has ended. Any bank or office thereof that is closed by decision of the officers of the bank may remain closed until such officers determine that the threat has ended. In either event, any bank or office thereof may remain closed for such further time thereafter as may reasonably be required to reopen, but in any event not later than the normal time of opening on the next business day.

(5) Any day on which a bank remains closed and any day on which a bank or any one or more of its offices is closed during any part or all of its normal banking hours, by decision of the banking board or by decision of its officers, shall be, with respect to such bank, or if not all of its offices are closed, then with respect to those offices that are closed, the equivalent of a legal holiday, as specified in section 24-11-101, C.R.S., and any act authorized, required, or permitted to be performed at or by or with respect to such bank or such office, as the case may be, on such day may be performed on the next succeeding business day without any liability or loss of rights resulting from such delay.