ALBANY - Starting next year, prospective lawyers must show that they have performed at least 50 hours of law-related pro bono service before being admitted to the New York state bar, Chief Judge Jonathan Lippman announced yesterday.

The chief judge said in his annual Law Day address at the Court of Appeals that the requirement would serve a two-fold purpose: It would address the large, unmet need for lawyers to represent the poor and it would inculcate in aspiring lawyers a career-long duty to serve the public.