13. Except in cases of superior force tenders must immediately follow the deadline set for the receipt of tenders. In cases of superior force, the opening of tenders shall be done at a later date, after notice has been given by telephone, telegram or letter to the persons to whom documents relating to the call for tenders have been forwarded.
R.R.Q., 1981, c. R-7, r. 1, s. 13.