1d081462_Some_Clarifications___WBXPress__Clarifications
[Points of doubt] 10. Whether additional Grade Pay admissible to the Teacher-in-Charge as per para 4(d) of Memo No.181-SE (B), dated 08.10.2009, will be counted towards subsequent incremental benefit? [Clarifications] 
Since the benefit of additional Grade Pay of a Teacher-in-Charge is of temporary nature, the amount of the said Grade Pay cannot be taken into account for incremental benefits but dearness allowance and house rent allowance will be paid on the said additional Grade Pay. The benefit will be available separately from the date of taking over charge Teacher-in-Charge as approved by the School authority and ratified by the concerned District Inspector of Schools and will continue will he /she hands over charge to a regular Headmaster/ Headmistress on his /her appointment to the post.
Pay Fixation of Teacher - Some Clarifications – WBXPress
Clarifications