substances decided by the Minister of Health, Labor and Welfare in order to prevent the impairment of workers' health caused by the said chemical substances:
o (i) chemical substances related to the recommendation under the provisions of paragraph (4) of Article 57-3 or the instruction under the provisions of paragraph (1) of Article 57-4; and
o (ii) chemical substances other than those listed in the preceding item, which are likely to bring about cancer or other serious health impairment to workers.
• (4) The Minister of Health, Labor and Welfare may, when he/she finds it necessary when he has made public the technical guidelines or the guidelines for preventing the impairment of workers' health under the provisions of the paragraph (1) and the preceding paragraph, give necessary guidance, etc., on the said guidelines or technical guidelines to employers or their organizations.
Article 28-2. (Investigation, etc. to Be Carried Out by Employer)
• (1) The employer shall, as provided for by the Ordinance of the Ministry of Health, Labor and Welfare, endeavor to investigate the danger or harm, etc., due to buildings, facilities, raw materials, gases, vapors, dust, etc., and those arising from work actions and other duties, and to take necessary measures prevent dangers oar health impairment to workers, in additon to taking the measures provided for by the provisions pursuant to this Act or the orders based on the results of the said investigations.
• (2) The Minister for Health, Labor and Welfare shall make publish the necessary guidelines relating to the measures in the preceding paragraph to achieve appropriate and effective implementation thereof, in