(a) If, on August 11, 1986, any unincorporated territory in a township that is adjacent to a township that is coterminous with a city (i) is wholly bounded by the coterminous township or (ii) is bounded solely by the coterminous township and (A) a river or lake, (B) property owned by the State of Illinois (except highway right-of-way owned in fee by the State), (C) a forest preserve district, or (D) the Illinois State boundary, that territory shall automatically, by operation of law, become annexed to the city, disconnected from the adjacent township, and included in the coterminous township without having the proposition to disconnect submitted to the voters in the adjacent township, except that when the unincorporated territory is, and as long as it remains, predominantly agricultural in nature, the automatic annexation shall not occur.
     (b) Any territory automatically annexed by operation of law to a city coterminous with a township under this Section, if the sale of alcoholic beverages is permitted in the territory and that sale is not permitted in the coterminous township and city, shall, on June 30, 1987, be disconnected from the city and its coterminous township and reconnected to the township from which it was originally disconnected.