120. Unfit persons not to be employed.- Where, as a result of an initial medical examination or periodical medical examination or after medical re-examination, a person has been declared unfit for employment in mines or in a particular category of mines or in any specified operations in mine, the person, shall not be employed or continue to be employed in mine or in the category of mines or on the operations specified, after the expiry of thirty days from the date of medical examination unless such person has filed an appeal against the declaration:

Provided that, if the qualified medical practitioner carrying out the initial medical examination, or the periodical medical examination or the appellate medical board carrying out the medical re-examination of persons already in employment is of the opinion that the disability of the person examined is of such a nature and degree that it will not seriously affect or interfere with the normal discharge of their duties, it may recommend their continuation in employment in the mine for a period not exceeding six months, during which such person may get their disability cured or controlled and appear for another medical examination after six months and be declared fit.