When switching to a billing period longer than the time elapsed from the beginning of the current billing period, you are transferred to a new billing period with the start date

When switching to a billing period shorter than the time elapsed from the beginning of the current billing period, you are transferred to a new billing period with the start date

the same as of the one you are switching from.

For example, a 1 month billing period starts on September 1. On September 15 you switch to a 2 month billing period. You are then transferred to a 2 month billing period with the start date of September 1 and closure date of October 31.

of the day you are switching to a new billing period on.

For example, a 2 month billing period starts on September 1. On October 5 you switch to a 1 month billing period. The current 2 month billing period is interrupted, closed and a new billing period is opened with the start date of October 5 and closure date of November 5.

Refunds for the interrupted billing period are calculated as described in refund formulas and subtracted from new recurrent fees prorated to the time remaining to a new billing period closure.

Refunds for the interrupted billing period are calculated as described in refund formulas and subtracted from new recurrent fees for a new billing period.