The requirements to enter a site will depend on the Network a cardholder is accessing, and the requirements of the Contractor in Charge if applicable. It is advised that Employers and/or cardholders check with the individual Network and/or Contractor in Charge to determine the required job roles and/or competencies required for site entry. 

You can find the contact details of all Network Operators on the RIW website here, and a list of Contractors In Charge and their Project sites here.