The PSCS must prepare a written plan specific to the risks associated to the construction stage and add to the Project Supervisor Design Stage / Principal Designer safety file relevant documents such as records of scaffolding tags and inspections. It is the homeowner’s responsibility to appoint a PSDS/PD and a PSCS/PC.
There must always be a site supervisor in charge on site and they must have the relevant experience and accreditation. In practice, in ROI this isn’t as well enforced as in NI.