Add the missing parenthetical

Error²Federal courts, Illinois courts21st and 22nd editions

The two general digests of international law are numbered by volume rather than by year and reprint many bodies' work, so a parenthetical carries the deciding court and the year.¹

1. 1R. 21.5.8 Other International Courts.
2. 2An error: the rule in note 1 allows one form, and this is not it.