Add the missing parenthetical

Error²Federal courts, Illinois courts21st and 22nd editions

A Commission investigation publication closes with two parentheticals: the date it issued, and the stage the investigation had reached when it did.¹

1. 1T1.2 International Trade Commission (USITC). Tables: R. 14.3 Administrative Adjudications and Arbitrations.
2. 2An error: the rule in note 1 allows one form, and this is not it.