The board of county commissioners of any county in this state may change the name of any town within such county upon a petition signed by a number of the legal voters of such town equal to 55 percent of the votes cast in such town at the last preceding general election and the new name suggested in such petition shall be adopted as the official name of such town. Such petition shall be filed with the county auditor and it shall be the duty of the auditor thereupon to give three weeks’ published notice of the filing of such petition by publishing the same in the official newspaper of the county, and the petition shall be taken up and considered at the next meeting of the board of county commissioners held not less than 30 days after the date of publication of such notice.