In case of an agency of the United States government, the record may be signed by the Chief of the survey party making the survey, setting forth his official title.
765 ILCS 220/8
No monument record shall be recorded unless the same is signed by an Illinois Registered Land Surveyor and impressed with his seal
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.