concurring.
It seems to me that Mr. Justice Powell’s opinion convincingly demonstrates the significant differences between the New York law at issue here and the Illinois law at issue in Trimble v. Gordon, 430 U. S. 762. Therefore, I cannot agree with the view expressed in Mr. Justice Blackmun’s opinion concurring in the judgment that Trimble v. Gordon is now “a derelict,” or with the implication that in deciding the two cases the way it has this Court has failed to give authoritative guidance to the courts and legislatures of the several States.