A federal magistrate judge in Manhattan is telling lawyers to get up to par on 15-month-old rule changes designed to speed up responses to discovery requests, clarify objections to requests and eliminate the confusion that slows down production.

Southern District Magistrate Judge Andrew Peck, a leading figure in the development of e-discovery, said too many lawyers are not adhering to Federal Rule of Civil Procedure 34, which was amended effective Dec. 1, 2015.