Your pay will be regulated under Govt. of MH rules. DOPT OMs are applicable for those who are recruited in central govt. services as direct recruits on selection (only Interview/Personality Test) from Central/State PSUs, Autonomous Bodies, Educational Institutions, Semi-Govt. Institutions, Nationalised Banks. The fixation benefit is NOT admissible for those who are recruited through OPEN COMPETITIVE EXAM. (written & Interview).
As I understand, the phrase OPEN COMPETITIVE EXAM. has different meaning in State Govt. selection procedure. Members from state services may elaborate further!