(law) A process of rulemaking in which a proposed rule is published in the Federal Register and is subject to comment by members of the general public.

plural of sidebar comment

(chiefly US, law) An unnecessary, often argumentative remark made by an attorney or witness during a trial or deposition.

The office or occupation of a commentator.

Relating to the making of commentaries.

of or relating to a commentary

In a commentatorial manner.