Nos. 212, 251 and 269, Dockets 93-4008(L), 93-4014 and 93-4044. Argued September 15, 1993. Decided November 4, 1993. James I. Wasserman, New York City (Vladeck, Waldman, Elias Engelhard, P.C., of counsel), for petitioner Local 144, Hotel, Hosp., Nursing Home Allied Services Union, SEIU, AFL-CIO. Richard J. Silber, Albany, N Y (Harder Silber and Bergan, of counsel), for petitioner New York State Nurses Ass'n. William M. Bernstein, Office of Gen. Counsel, N.L.R.B., Washington, DC (Jerry M. Hunter,