You may increase your insurance level within 15 months by up to 20% so that the increase takes effect immediately in the calculation basis of your earnings-related daily allowance.
If you increase your insurance level by more than 20%, we cannot take into account the part of the increase that exceeds 20% in the calculation of your earnings-related daily allowance until you have maintained the new insurance level for at least 15 months.
In other words, if you raise your insurance level by more than 20%, you must maintain the increased level for at least 15 months for the portion exceeding 20% to be included in the calculation basis of your earnings-related daily allowance.