In case of grave public emergency, to be determined by the Commissioner of Revenue of the Department of Revenue, with the approval of the Governor and Attorney General, the Commissioner of Revenue, may postpone in any county the date fixed by law for the sale of lands for delinquent taxes. In the event any such sale is postponed, the Commissioner of Revenue of the Department of Revenue, with the approval of the Governor and Attorney General, shall designate a date for such sale. Notice of a sale shall be given by advertising it in the manner prescribed by law for the sale of land for taxes; and the same shall be made at the same place and subject to all the provisions of law applicable to such sales at the time appointed by law, and lists of lands sold to the state and to individuals shall be filed in the office of the clerk of the chancery court within the same relative period of time after the sale as is allowed for filing such lists after sales at the regular time, and the clerk shall at once record them; and such lists shall be as valid and have the same effect and be subject to all the provisions of law applicable to such lists made of lands sold at the regular sale for taxes. The Commissioner of Revenue of the Department of Revenue shall provide notice to the clerk of the board of supervisors of the postponement of any sale for taxes in such county and the clerk of the board of supervisors shall enter such notice on the minutes of the board, but the failure of the Commissioner of Revenue to so notify the clerk of the board of supervisors to so record the same shall not invalidate any sale made hereunder.