The PCBU must ensure implemented controls remain effective, which includes checking they are fit for purpose, suitable for the nature and duration of the work and installed and used correctly. Maintenance may include regular inspections, supervision of correct use, preventative maintenance and testing programs for chemical storage and handling systems and periodic air monitoring to confirm engineering and administrative controls still work. Procedures should let workers report defective controls as soon as they are found so repair is prompt.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.