(620 ILCS 25/22)
(from Ch. 15 1/2, par. 48.22)
No airport zoning regulations adopted under this Act shall require the
removal, lowering, or other change or alteration of any structure or tree
not conforming to the regulations when adopted or amended, or otherwise
interfere with the continuance of any non-conforming use, except as
provided in Sections 23 and 25.
(Source: Laws 1945, p. 317.)