Appointment of a Safety Officer)
Article 4 (1) The appointment of the safety officers pursuant to the provision of paragraph (1) of Article 11 of the Act shall be made as prescribed below:
(i) To appoint within 14 days of the date when the grounds necessitating appointment of a safety officer have arisen;
(ii) To appoint a person who is exclusively assigned to the workplace. However, in that or more safety officers are to be appointed and persons listed in item (ii) of the next Article are included in those safety officers, this provision shall not apply to one of the said persons;
(iii) For the workplace falling under the following categories, to appoint the necessary number of safety officers to always supervise the technical matters pertaining to the safety among those works set forth in each item of paragraph (1) of Article 10 of the Act during the operation of a production facilities unit designated by the Director of the Prefectural Labour Bureau having the jurisdiction over the district where the said workplace is located (hereinafter referred to as "Director of the competent Prefectural Labour Bureau"): (a) The workplace where, among the chemical facilities (meaning the chemical facilities listed in item (i) of Article 9-3 of the Enforcement Order of Industrial Safety and Health Act (hereinafter referred to as the "Order"), the same shall apply hereinafter), the one such as a reactor, etc., in which the exothermal reaction arises or due to the similar abnormal conditions that explosions, fires, etc. is possible to arise (due to excluding piping; hereinafter referred to as "special chemical facilities"); (b) The special chemical facilities designated by the Director of the competent Prefectural Labour Bureau (hereinafter referred to as "designated workplaces").
(iv) For the workplace regularly employing workers of number or more listed in the right column of the following table corresponding to categories of industry listed in the medium column of the same table, to appoint at least one as a fulltime safety officer among those appointed to supervise the technical matters concerning the safety among those works set forth in each item of paragraph (1) of Article 10 of the Act. However, in the case of industries falling under category 4 in the same table, this shall be limited only to a workplace in which there have been exceeding 100 cases which h compelled workers to be absent from their work for one day or more due to industrial accidents in the past three years.