The download is normally available 5 working days before the effective date, and can be downloaded beforehand. The new tariff automatically becomes live on the tariff change date. Tariff cards work in exactly the same way as downloads, they can be pre-loaded, and the old file will automatically be deleted on the effective date. We will send you the chip within 5 working days of the tariff change date, the tariff chips need to be installed on the effective date.