A worker engaged in work between 10 p.m. and 5 a.m. (or 11 p.m. to 6 a.m. for the area or period designated by the Minister of Health, Labour and Welfare as required; hereinafter referred to as "night work") whose frequency of night work and other particulars fall under the requirements provided for by Order of the Ministry of Health, Labour and Welfare in consideration of helping to maintain the health of workers engaged in night work, may submit to the employer a document certifying the results of a medical checkup that the worker has undergone at the worker's own initiative (this excludes a medical checkup as referred to in the proviso of paragraph (5) of the preceding Article), pursuant to Order of the Ministry of Health, Labour and Welfare.
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