It shall be the responsibility of the employee leasing company to purchase and maintain a separate policy providing standard workers' compensation and employers' liability insurance for each client company. The experience of all of the employees leased to a client company shall be combined with the experience of the employees of the client company for purposes of calculating an experience modification. The experience modification so calculated shall be applied to the client company's policy and all policies maintained for it by a leasing company or leasing companies. Each policy written to cover leased employees shall be issued to the employee leasing company as the named insured. The client company shall be identified thereon by the attachment of an appropriate endorsement indicating that the policy provides coverage for leased employees in accordance with Massachusetts law. The endorsement shall, at a minimum, provide for the following:
211 CMR, § 111.03