(a) When the notice is required to be given for a specified number of weeks, it must be given by consecutive weekly insertions for the number of weeks so specified. When the notice is of a proceeding to be had or of an act to be done on a specified day:

(1) If the publication is for one week, the insertion must be not less than six days before such day;

(2) If for two weeks, the first insertion must be at least 12 days before such day;

(3) If for three weeks, the first insertion must be at least 18 days before such day;

(4) If for four weeks, the first insertion must be at least 24 days before such day;

(5) If for five weeks, the first insertion must be at least 30 days before such day;

(6) If for six weeks, the first insertion must be at least 36 days before such day; and

(7) So on at the same rate of increase, the time to be computed as provided in Section 1-1-4.

(b) When the time is specified in days, two weeks' notice is equal to 15 days' notice; three weeks to 20 days; four weeks to 30 days; and six weeks to 40 days.

(c) A newspaper publishing a notice shall also place the notice on an Internet website operated by the newspaper, if the newspaper publishes a website, and on a statewide website established and maintained by an entity having the capacity and ability to receive and upload legal notices from the majority of newspapers in this state as a repository for the notices. Posting on the Internet shall begin on the first day of insertion and run continuously until the expiration of the specified time. All newspaper notices required pursuant to this section to be placed on the Internet shall remain valid for all purposes, and the legality of the newspaper publication shall not be affected by the failure of the newspaper for any reason to upload legal notice publications to a statewide website or to another Internet website or to accurately post the notice publication on any website.