(a) When an employer is insured under this chapter, the right herein established to obtain compensation shall be the only remedy against the employer; but in case of accident to, or disease or death of, an employee not entitled to compensation under this chapter, the liability of the employer is, and shall continue to be the same as if this chapter did not exist.
(b) For the purposes of this section, a contractor shall be deemed the employer of a subcontractor's employees only if the subcontractor fails to comply with the provisions of this chapter with respect to being an insured employer. The “statutory employer and borrowed servant” doctrine are not recognized in this jurisdiction, and an injured employee may sue any person responsible for his injuries other than the employer named in a certificate of insurance issued under section 272 of this title.