61. We have also tried to make the whole arrangement as automatic and free from interference as possible. The basic features of the scheme will be embodied in the Constitution itself, while periodic changes will be made by the President on the recommendation of the Finance Commission, which, we hope, will command the confidence of all. As frequent changes are undesirable, we have recommended a five yearly review though in special circumstances the Finance Commission may embark on a review at a shorter interval. The provinces will not be sure of their position and can go ahead with their plans.