Hi,
You can cover your dependents under esic. Definition of the dependents as per act is as follows: If your in laws come under the below category, you can add them in your family details in your esic portal.
1[(6-A) “ dependant ” means any of the following relatives of a deceased insured person, namely : —
2[(i) a widow, a legitimate or adopted son who has not attained the age of twenty-five years, an unmarried legitimate or adopted daughter ; ]
3[(ia) a widowed mother ;]
(ii) if wholly dependent on the earnings of the insured person at the time of his death, a legitimate or adopted son or daughter who has attained the age of 4[twenty-five] and who is infirm ;
(iii) if wholly or in part dependent on the earnings of the insured person at the time of his death, —
(a) a parent other than a widowed mother,
(b) a minor illegitimate son, an unmarried illegitimate daughter or a daughter legitimate or adopted or illegitimate if married and a minor or if widowed and a minor,
(c) a minor brother or an unmarried sister or a widowed sister if a minor,
(d) a widowed daughter-in-law,
(e) a minor child of a pre-deceased son,
(f) a minor child of a pre-deceased daughter where no parent of the child is alive, or
(g) a paternal grand-parent if no parent of the insured person is alive ;]
6[(11) “ family ” means all or any of the following relatives of an insured person, namely : —
(i) a spouse ;
(ii) a minor legitimate or adopted child dependent upon the insured person ;
(iii) a child who is wholly dependent on the earnings of the insured person and who is —
(a) receiving education, till he or she attains the age of twenty-one years,
(b) an unmarried daughter ;
(iv) a child who is infirm by reason of any physical or mental abnormality or injury and is wholly dependent on the earnings of the insured person, so long as the infirmity continues ;
1[(v) dependant parents, whose income from all sources does not exceed such income as may be prescribed by the Central Government ;
(vi) in case the insured person is unmarried and his or her parents are not alive, a minor brother or sister wholly dependant upon the earnings of the insured person ;]]