1. Sir, use of words of any kind in respect of learners like-interns, trainers, learners, probationers, casuals or temporary etc. etc. is irrelevant so far coverage under ESI Act, 1948 is concerned.
2. Only the persons engaged under the provisions of the Apprentice Act, 1961( and that too only for periods as specified in said Act) are not covered under said Act by virtue of provisions contained in section 2(9) of said Act. The said Act was amended in the year 2010 in order to make the coverage position more clear. In EPF & MPs Act, the position may be slightly different since the said Act also recognises the position in respect of "Standing Orders of the establishment".