The amendments to Rule 9A are effective as to all motions served on or after November 1, 2018 (Applicable to civil actions) A motion under Rule 12(b)(6), like the traditional demurrer, tests the legal sufficiency of the complaint, counterclaim, or cross-claim.(f) Motion to strike. I served a crossmotion (or a motion to strike) together with my opposition. The Massachusetts Trial Court Law Libraries make every effort to provide a current, accurate copy of the rules of court on this site. A Motion to Strike can remove pleas, statements, and evidence from judicial proceedings in a lawsuit. I am seeking clarification on filing a Motion to strike under MA Superior Civil Court Rule 9A governing the 9A Package? "Plaintiff's motion for summary judgment was filed 10 months late and within 3 weeks of the pending trial date. A motion to strike is a legal maneuver that enables a party in civil litigation to request the removal of certain parts of the opposing party's pleadings. (4) Motion to Strike, Sever, or Try Separately.