Section 51A(1) in The Employees' State Insurance (Central) Rules, 1950
(1)In respect of an employee who is a person with disability under the Persons with Disabilities (Equal Opportunities, Protection of Rights and Full Participation) Act, 1995 (1 of 1996), and under the National Trust for Welfare of Persons with Autism, Cerebral Palsy, Mental Retardation and Multiple Disabilities Act, 1999 (44 of 1999), the employer shall not be required to pay employer's share of contribution upto a maximum period of three years from the date of commencement of the contribution period.