①If it is difficult to calculate an insured person's monthly remuneration amount pursuant to the provisions of Article 41, paragraph (1), Article 42, paragraph (1), Article 43-2, paragraph (1) or paragraph (1) of the preceding Article, or if the amount calculated pursuant to the provisions of Article 41, paragraph (1), Article 42, paragraph (1), Article 43, paragraph (1), Article 43-2, paragraph (1) or paragraph (1) of the preceding Article is found to be significantly unjustifiable, notwithstanding these provisions, the insured person's monthly remuneration amount is an amount determined by the insurer.

②In the case of the preceding paragraph, if the insurer is a health insurance society, the calculation method in the same paragraph must be specified by the constitution.

③In calculating the monthly remuneration amount for an insured person who receives remuneration at two or more places of business at the same time, the total sum of the amounts calculated pursuant to the provisions of Article 41, paragraph (1), Article 42, paragraph (1), Article 43, paragraph (1), Article 43-2, paragraph (1), or paragraph (1) of the preceding Article or paragraph (1) is the person's monthly remuneration amount.