Pursuant to Order of the Ministry of Health, Labour and Welfare, an employer (where the original contractor is regarded as the employer pursuant to the provisions of Article 8, paragraph (1) or paragraph (2) of the Premiums Collection Act, with regard to those workers engaged in the undertaking other than those employed by the original contractor, the sub-contractor who employs the workers; the same applies hereinafter) must notify the Minister of Health, Labour and Welfare of the fact that workers they employ have become insured persons or ceased to be insured persons, with regard to a covered undertaking (where a series of undertakings carried out by means of successive contracts is regarded as a single undertaking pursuant to the provisions of Article 8, paragraph (1) or paragraph (2) with regard to those workers engaged in the undertaking other than those employed by the original contractor, each undertaking pertaining to the successive contracts; the same applies hereinafter) carried out by the employer, and of other matters specified by Order of the Ministry of Health, Labour and Welfare. The same applies to a labor insurance affairs association prescribed in Article 33, paragraph (3) of the Premiums Collection Act that manages affairs related to the notifications referred to in the first sentence of this Article entrusted by the employer, pursuant to Article 33, paragraph (1) of the Premiums Collection Act, as part of the labor insurance-related affairs prescribed in the same paragraph (hereinafter referred to as a "labor insurance affairs association").