In In re Belmont Fire Protection District, 111 Ill. 2d 373, 95 Ill. Dec. 521, 489 N.E.2d 1385 (1986), the supreme court found unconstitutional a section of the Act that allowed municipalities within counties having a population of between 600,000 and 1 million to disconnect from one fire protection district and transfer to another district that was already providing service to part of that municipality. At the time, only Du Page county fit within that population classification. Our supreme court found no rational reason why a municipality served by multiple fire protection districts in a county with a population between 600,000 and 1 million was any different from a municipality served by multiple districts in a county of less than 600,000 or more than 1 million. See Belmont, 111 Ill. 2d at 382. The danger sought to be eliminated, i.e., multiple fire protection districts serving one municipality, existed in other counties as well, regardless of the population of the county in which it was located. Belmont, 111 Ill. 2d at 382.