Dear Pragathi,
If this is a question from the principal employer under the CLRAA,1970, it is not necessary for the PE to issue appointment letter to any contract labor. It is for the contractor who is engaged by the PE to do the thing.
If you are knowledgeable about any fact, resource or experience related to this topic - please add your views. For articles and copyrighted material please only cite the original source link. Each contribution will make this page a resource useful for everyone. Join To Contribute