A description defining land boundaries written for conveyance or describing the extent of a survey or for other purposes shall be complete, providing definite and unequivocal identification of the property lines or boundaries of a unique parcel. The description shall be sufficient to be platted, located on the ground and, when appropriate, mathematically closed. The description shall commence at or relate to a physically monumented corner or boundary control line of record.

1) If the land is located in a recorded subdivision, the description shall contain the number or other description of the lot, block or other part of the subdivision, or shall describe the parcel by reference to a known corner of the lot, block or other recorded reference.

2) If the parcel is not located within a recorded subdivision, the description shall state the section, township, range, principal meridian and county, and shall describe the parcel by reference to quarter section, quarter-quarter section, government lot, or metes and bounds, beginning/commencing at a monumented corner and referencing an established and monumented line in the United States Public Land Survey System.

3) In any case, when a new description is created or a previous description is rewritten, enough of the original description should be maintained so as to form a trail or chain to follow the history of the parcel.

(Source: Amended at 34 Ill. Reg. 6668, effective April 27, 2010)