Add the supplement's year

Warning²Federal courts, Illinois courts21st and 22nd editions

A supplement or pocket part is dated by the year on its own title page rather than by the year of the main volume.¹

1. 1R. 12.3.2 Year of Code; R. 12.3.1(e) Supplements; R. 3.1(c) Supplements.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.