Dear Pradeep,
The registration certificate of a Principal Employer and the Licence of the Contractor engaged by him have to be amended accordingly whenever changes i.e., - every increase - occur in the total no of contract labor in the Contractor's existing work-specific licence and consequently the no of contract labor in the PE's already issued registration certificate for both the fees are based on the no of contract labor only. Accordingly, if the subsequent increase in the no of workmen under any individual contractor does not cause increase in the no of contract labor mentioned in the R.C, well, the PE can choose not to amend his R.C. But, it should not be the concern of the contractor for he cannot employ more no of workmen than he was licensed to do. Therefore, for the sake of compliance, the contractor has to apply for amendment of his licence due to the increase in the no of contract workmen for the same work.