Part 6: Miscellaneous Section 102: Billing limits for mobile phones
This section requires mobile phone service providers to offer customers entering into a mobile phone contract the option of placing a limit on their bill. Where a limit is set, the provider must notify the customer (so far as practicable) in reasonable time if a limit is likely to be reached and as soon as practicable when a limit is reached, and the limit may only be exceeded if the customer agrees after being so notified.