This is governed by Regulation 103-A which reads as follows:

A person on becoming an IP for the first time shall be entitled to Medical Benefit for a period of 3 months provided that where such a person continues for 3 months or more to be an employee of a factory or establishment to which the Act applies, he shall be entitled to Medical Benefit till the beginning of the corresponding benefit period.

Person in respect of whom contribution has been paid in a contribution period for not less than half the number of days in the said contribution period shall be entitled to Medical Benefit till the end of the corresponding benefit period.

An IP whose title to Medical Benefit has ceased under this Regulation shall again be entitled to Medical Benefit from the date of his re-employment as an employee under the Act in a Factory or Establishment to which the Act.