Like other court filings, the format, contents, and timing of the filing of amicus briefs are governed by court rules. The following is a list of rules you should consider when filing an amicus brief in the Supreme Judicial Court or the Appeals Court in Massachusetts. Annotated versions of these court rules can be found on Lexis Advance and Westlaw. Also, some legal rules are derived from case law, e.g. disclosure requirements, so review the suggested treatises for other requirements. For example, see Appellate Practice in Massachusetts § 17.3.4 for a discussion of the case law in Massachusetts on the disclosure requirements for an amicus.
Massachusetts Rules of Appellate Procedure
Supreme Judicial Court Rules & Orders
Appeals Court Rules & Orders (applicable for filings in the Massachusetts Appeals Court)