A satisfactory method of amendment. The peculiar problems of federal States in regard to the amending body are that (a) neither the Centre nor the units by themselves should be given the power to alter the constitution, as such power is likely to affect one of the essential features of federalism, viz. the supremacy of the constitution ; and (b) it is desirable that in the body which is authorized to change the constitution, both the Centre and the units are given some place, and further the smaller states must be protected against dominance by the larger. How these problems are faced by the different federations has already been indicated in (i) and (ii) above.