The official newspaper as chosen by the electors of the county shall be the official newspaper of the municipality in which it is published, and such official notices and legal publications as the municipality is required to publish by law shall be published therein. In municipalities where the official newspaper is not published, the governing body of the municipality, annually by resolution at its first meeting in May, or as soon thereafter as practicable, shall designate a newspaper published in the municipality, or if there is not one published, then it shall designate a newspaper which is circulated in the municipality, as the official newspaper of the municipality, including park districts therein, for the publication of notices and legal publications, including legal notices and official statements of the school districts embracing or encompassed by the municipality.