++++ Social security for migrant workers - Family benefits - Article 73(2 ) of Regulation No 1408/71 creating a regime specifically applicable to workers subject to the legislation of one of the Member States - Declaration of invalidity by the Court - Effects of invalidity - General application, in the absence of new measures by way of a regulation, of the regime applicable in the other Member States . ( EEC Treaty, Arts 48 and 51; Council Regulation No 1408/71, Art . 73 )