by addition of Explanation (c) in Regulation 2(s) did not have the effect of amending the Regulations relating to pension, as contained in Regulation 38 read with Regulations 2(d) and 35 of the Regulations of 1995. Even otherwise, if it had the effect of amending the pay and perks ‘average emoluments’, as specified in Regulation 2(d), it could not have operated retrospectively and taken away accrued rights. Otherwise also, it would have been arbitrary exercise of power. Besides, there was no binding statutory force of the so called Joint Note of the Officers’ Association, as admittedly, to Officers’ Association even the provisions of Industrial Disputes Act were not applicable and joint note had no statutory support, and it was not open to forgo the benefits available under the Regulations to those officers who have retired from 1.4.1998 till December 1999 and thereafter, and to deprive them of the benefits of the Regulations. Thus, by the Joint Note that has been relied upon, no estoppel said to have been created. There is no