(3) Subject to such rules as may be made in this behalf, if the prescribed authority is of the opinion
that such circumstances as are referred to in sub -section ( 4) of section 132 are present, it may exempt any
railway servant from the provisions of sub -section ( 1) or clause ( i) of sub -section ( 2):
Provided that a railway servant so exempted shall, in such circumstances as may be prescribed, be
granted compensatory periods of rest for the periods he has foregone.