9. Where an employer receives directly from an exporter at a workplace a controlled product that has not been labelled by the importer of that product, he himself shall affix to that product the label required by the Hazardous Products Act (R.S.C. 1985, c. H-3), if he has given an undertaking in writing to that effect to the importer, as provided for in section 23(5) of the Controlled Products Regulations (SOR/88-66).