Dr. Anand Prakash, counsel for the appellant, made the following three contentions before us: (1) that the compensatory allowance was given purely on the basis of the Central Government circular dated September 3, 1957, on the distinct understanding that it was a temporary measure which could be withdrawn at the will of the employer and did not amount to a condition of service at all; (2) that even if the provisions of section 9A of the Act applied, since the management had substituted the house rent allowance for compensatory allowance the workers were not adversely affected and therefore, it was not necessary to give and notice to them before withdrawing the concession of the compensatory allowance: and (3) that even if the provisions of section 9A of the Act were not complied with, the Tribunal should have at least gone into the question on merits instead of basing its award on the question of applicability of section 9A of the Act.