8 Ill. Adm. Code 40.130
Backtagging
Section 40
Section 40.130 Backtagging
All cattle over 2 years of age
consigned to a livestock auction market shall comply with the Market Cattle
Identification Program as follows:
a) Each animal shall be backtagged with an official Illinois
market cattle backtag.
b) Cattle that are blood tested for brucellosis by the livestock
auction market veterinarian shall have the backtag marked through with a crayon
or paint.
c) Report of such backtagging on forms provided by the United
States Department of Agriculture shall be submitted to the Department within 7
days of backtag application.