“(1) the qualification process must be preceded by a public notice to that effect on the electronic tendering system indicating, with the necessary modifications, such information as that required under subparagraphs 1, 2 and 4 to 6 of the second paragraph of section 1.2 and the period of validity of the list of qualified enterprises or the method used to inform all interested persons of the time as of which that list will no longer be used;”.