as per HSE (Health Safety and Environment) contract performance,there are three modes of contracts:mode-1 contract, where the contractor is providing such servicenot having own HSEMS plan and working under the client HSEMSplan.Mode-2 contract, where the contractor is providing the serviceand having contract HSEMS plan and follow ups.Mode-3 contract, where the contractor is providing such servicehaving HSEMS (Management System) in place, but working under theclient HSEMS plan.