The State Govt. Employees are enjoying this benefit since 1981 vide G.O. No. 3430-F dated 02.05.1981.
The said LTC Rules have been superseded by the following G.O.s:
G.O. No. 9924-F dated 07.12.2005
G.O. No. 607-F dated 20.01.2006
G.O. No. 4367-F dated 13.06.2006.
I shall post it here one by one.