If the city is required to publish a notice or advertisement in a legal newspaper in or of general circulation in the city, and if there is no legal newspaper in or of general circulation in the city, then the city shall publish such notice or advertisement in a legal newspaper in or of general circulation in the county in which the city is located. If there is no legal newspaper in or of general circulation in such county, then the city shall publish such notice or advertisement by posting a written or printed copy thereof in each of three public places in the city for the same period of time the city is required to publish the notice or advertisement in a legal newspaper.