The New York State Bar Association will retain private counsel to explore whether the state’s requirement that all lawyers disclose the hours and money they contribute to pro bono can be undone through legislation or litigation.

On a day when opposition to the mandatory reporting rule was evident during an extended discussion by the state bar’s House of Delegates, President David Schraver said Friday his group would also cooperate with local bar associations to coordinate anti-disclosure efforts and encourage lawyers to write to Chief Judge Jonathan Lippman opposing the rule.