If it is established that in both the companies there are certain common factors, such as ownership, functional integrity, supervision, management, inter-dependency etc. then both the companies are liable for clubbing together for the purpose of coverage of establishments under various social security enactments.
If you are knowledgeable about any fact, resource or experience related to this topic - please add your views using the reply box below. For articles and copyrighted material please only cite the original source link. Each contribution will make this page a resource useful for everyone.