Registration of a factory/establishment with the Employees' State Insurance Corporation is a statutory responsibility of the employer under Section 2-A of the Act read with Regulation 10-B. The employer, in respect of a factory/establishment to which the Act applies for the first time, is liable to furnish Declaration of Registration in Form 01 (Employers' Registration Form) to the Sub Regional Office, within 15 days after the Act becomes applicable. This is obligatory on the part of the Employer. In addition to this, the employer will have to indicate, in a separate sheet, the name and address of the factory/establishment, number of employees, nature of duty and name, designation and address of the Manager, controlling such persons in respect of any other office(s) situated outside the premises of the Factory/ Establishment.