ORDER :

1. Five sets of officers belonging to the Indian Police Service (IPS) have applied for being impleaded in this set of petitions for special leave to appeal (SLPs). These proceedings arise from a common Judgment delivered by a Division Bench of the Delhi High Court in five writ petitions brought by Group A officers of the Central Industrial Security Force (CISF), Central Reserve Police Force (CRPF), Indo Tibetan Border Police (ITBP), Border Security Force (BSF) and Sashastra Seema Bal (SSB). These forces are collectively referred to as the Central Armed Police Force(s). In course of hearing, intervention has also been asked for by the Central Indian Police Service Association on the strength of caveat applications lodged by them.

2. The scope of dispute involved in the writ petitions out of which these proceedings arise have been summarised in the first paragraph of the Judgment under appeal. This paragraph reads:-

"These five petitions, by personnel of different services viz. Central Reserve Police Force (CRPF), Border Security Force(BSF), Sashastra Seema Bal (SSB), Indo Tibetan Border Police(ITBP), and Central Industrial Security Force (CISF), collectively known as Central A