petition. The claim of the petitioners is based on the fact that Bhakra Beas Management Board (for short, BBMB) was following the pay pattern of the Government of Punjab upto 23.06.1992, after when the pay scales applicable to employees of Punjab State Electricity Board (for short, PSEB) were also extended to them. The Government of Punjab by its letter dated 01.12.1988 had allowed for one additional increment on every occasion after completion of 8 years and 18 years of service on or after 01.01.1986 in the form of proficiency step-up. The benefit of the instructions was extended to all the petitioners on completion of 8 and 18 years of service, who were Class-I and II officers. PSEB had also adopted similar policy as regards application of additional increment on completion of 8 and 18 years of service. On the basis of a clarification issued on 26.03.1990 by the Punjab Government, it was decided that the proficiency step-up would not be granted in cases where the pay structure already provided for 3 structures of pay, namely, time scale, senior scale and selection grade. This clarification had already been provided by PSEB by its letter dated 23.12.1994. In turn, it was also adopted by BBMB by its proceedings dated 01.04.1998. In CWP No.3397 of 1991, decided on 12.12.1991 titled as 'Beant Singh Bedi Versus State of Punjab