(1) In this Chapter, a person conducting a business or undertaking that commissions a construction project is, subject to this regulation, the principal contractor for the project.(2) If the person referred to in subregulation (1) engages another person conducting a business or undertaking as principal contractor for the construction project and authorises the person to have management or control of the workplace and to discharge the duties of a principal contractor under this Chapter, the person so engaged is the principal contractor for the project.(3) If the owner of residential premises is an individual who directly or indirectly engages a person conducting a business or undertaking to undertake a construction project in relation to the premises, the person so engaged is the principal contractor for the project if the person has management or control of the workplace.(4) A construction project has only 1 principal contractor at any specific time.