A three-year-old pact among brokerage houses that outlines what customer information brokers can take when moving from one employer to another has cut employment litigation among brokerage shops. But some say the rules are too general and that brokerages are starting to seek court relief again.

Ted Levine of New York’s Wachtell, Lipton, Rosen & Katz helped Merrill Lynch & Co., the Smith Barney division of Citigroup Global Markets Inc. and UBS Financial Services Inc. establish the so-called Protocol for Broker Recruiting three years ago. Currently, about 30 companies are on board, including large and small industry players, Levine said.