Section 11-504-21 - General requirements for certification(a) No person shall perform any abatement project without first being certified as a worker or a contractor/supervisor by the department.(b) No person shall engage in any on-site supervision of a worker during an abatement project without first being certified as a contractor/supervisor.(c) Any person seeking certification as a worker or contractor/supervisor shall apply for a certificate in accordance with section 11-504-6.[Eff ] (Auth: HRS § 342P-41) (Imp: 40 CFR Part 763, Appendix C)