The control corner may or may not be included within the perimeter of said tract or parcel.
765 ILCS 220/3.06
"Control Corner" means any land survey monument whose position controls the location of the boundaries of a tract or parcel of land
Known as the Land Survey Monuments Act
The act spans §§ 765-220-0-01 to 765-220-9 (18 sections).
P.A. 79-649.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.