A Plat of Annexation is prepared when a property is presently unincorporated, not part of a city, town, or village. The territory must be contiguous to the annexing municipality. The new boundary of the annexing municipality as described in the petition for annexation will extend to the far side of any adjacent highway and must include all of every highway within the area to be annexed. The Illinois Legislature has entrusted to the corporate authorities of municipalities the absolute right to determine the boundaries of their communities and the rate at which development will take place. The addition of new land to corporate boundaries is achieved through annexation in accordance with state statutory procedures. The Illinois Municipal Code provides for several means of annexing property to a municipality.