P. SATHASIVAM, J.

Aggrieved by the notice of the respondent dated August 16, 1990, the petitioner has filed the above writ petition.

The case of the petitioner is briefly stated hereunder : The petitioner is a company registered under the Companies Act, 1956, and having a factory at Ennore, wherein it is engaged in the manufacture of medium duty commercial vehicles. It is covered by the Employees' State Insurance Act, 1948, (hereinafter referred to as "the Act"). The company has engaged various third parties and contractors for the purpose of carrying out various activities including repairs to buildings, plant and machinery and for the purpose of doing various repairs. Various activities including supply of materials, is entrusted to third parties who at times carry out work inside the factory premises of the company. The management has no method of knowing whether these contractors or third parties at all employ persons and if so, the number of persons who are in employment with such contractors or third parties. The bills of these third parties are paid in lumpsum upon presentation and they are not expected to give details of the labour element in the bills. The respon