Registration of establishment requires workforce details, category-specific particulars, timely intimation of changes, and workplace display of the certificate. A certificate of registration of establishment in Form III is granted for covered establishments and requires particulars of the nature of work, employee strength, contractor details, migrant workers, and category-specific information for factories, mines, dock work, and construction work. The certificate is non-transferable, the workforce must not exceed the maximum stated, and the employer must intimate changes in employee strength or working conditions within thirty days, notify commencement or cessation electronically, and display the certificate at the workplace.