I find a letter No.2(71)-E III / 60 dated 03-12-1960 issued by GOI treating period spent on training as on duty. A copy of letter reproduced below.
Shri S. Narayana Nair may see the terms of offer of his appointment. He may make a representation to Office. The reply may be shared with - sent to LIC PC.
In the initial years of post nationalisation, no training as such for new recruits, if memory does not fail me.