If the amount obtained by dividing the total amount of remuneration received for three consecutive months at the place of business employing an insured person (in each month, the number of days based on which remuneration is paid must be no less than 17 days) by three is significantly higher or lower than the person's monthly remuneration that is the basis of the standard monthly remuneration amount and the insurer finds it necessary, the insurer may revise the standard monthly remuneration amount by setting the first-mentioned amount as the monthly remuneration amount starting from the month following the months in which the monthly remuneration amount was significantly high or low.
A standard monthly remuneration amount revised pursuant to the provisions of the preceding paragraph is the standard monthly remuneration amount for each month until August in that year (until August in the following year for a revision in any month from July to December).
前項の規定によって改定された標準報酬月額は、その年の八月（七月から十二月までのいずれかの月から改定されたものについては、翌年の八月）までの各月の標準報酬月額とする。