In Delaware, Local Rule 7.1.2(b) sets deadlines for responding to motions, and states that
Except for the citation of subsequent authorities, no additional papers [other than the opening, answering, and reply briefs] shall be filed absent Court approval.
Based on this rule, parties file "notices of subsequent authorities" to present after-arising citations (and sometimes other content) to the Court.
But some attorneys disagree about just how much argument can accompany the "citation[s]" a notice of subsequent authority. The authority is mixed.
In some cases, the Court has declined to consider notices containing argument that are filed without leave. See, e.g., Forest Labs., Inc. v. Amneal Pharm. LLC, C.A. No. 14-508-LPS, 2015 U.S. Dist. LEXIS 23215, at *51 …