Use the agency's abbreviation correctly

Error²Federal courts, Illinois courts21st and 22nd editions

A Department of Agriculture directive names the agency that issued it by the unpunctuated short form the tables list beside that agency, not by its full name or by a periodized abbreviation of it.¹

1. 1T1.2 Department of Agriculture (USDA).
2. 2An error: the rule in note 1 allows one form, and this is not it.