Section 47(2) in The Persons With Disabilities (Equal Opportunities, Protection Of Rights And Full Participation) Act, 1995
(2)No promotion shall be denied to a person merely on the ground of his disability:Provided that the appropriate Government may, having regard to the type of work carried on in any establishment, by notification and subject to such conditions, if any, as may be specified in such notification, exempt any establishment from the provisions of this section.