Sec. 1. (a) Municipalities are classified according to their status and population as follows:
STATUS AND POPULATION
CLASS
Cities of 600,000 or more
First class cities
Cities of 34,000 to 599,999
Second class cities
Cities of less than 34,000
Third class cities
Other municipalities of any
population
Towns
(b) Except as provided in subsection (c), a city that attains a population of thirty-four thousand (34,000) remains a second class city even though its population decreases to less than thirty-four thousand (34,000) at the next federal decennial census.
(c) The legislative body of a city to which subsection (b) applies may, by ordinance, adopt third class city status.