53. An employer shall, within 30 days following a final decision granting an application for exemption in whole or in part, indicate on the label or the sign, as the case may be, and on the material safety data sheet, in place of the indications referred to in section 52, the fact that his application for exemption has been granted, the date of the decision granting the exemption and the registration number of the application.
Those indications shall appear on the label or sign and on the data sheet for as long as the exemption is valid.