Such average customer lifetime would be the period of time over which the customer contributes to the recovery of the: (a) downstream costs that are annualised according to a depreciation method that is appropriate to the asset in question and the economic lifetime of the corresponding assets required for the retail operations (including network costs that are not included in the wholesale NGA access service); and (b) other downstream costs that are normally not annualised (typically the subscriber acquisition costs) and which the operator incurs to gain customers and should seek to recover over the latters’ average lifetime.

Each home provider shall grant to all their roaming customers the opportunity to opt deliberately and free of charge for a facility which provides information on the accumulated consumption expressed in volume or in the currency in which the roaming customer is billed for retail data roaming services provided both within and outside the Union and which guarantees that, without the customer's explicit consent, the accumulated expenditure for such retail data roaming services over a specified period of use does not exceed a specified fi ...[+++]nancial limit.

Each home provider shall grant to all their roaming customers the opportunity to opt deliberately and free of charge for a facility which provides information on the accumulated consumption expressed in volume or in the currency in which the roaming customer is billed for regulated data roaming services and which guarantees that, without the customer's explicit consent, the accumulated expenditure for regulated data roaming services over a specified period of use does not exceed a specified financial limit.

A home provider may delay such a switch until the previous roaming tariff has been effective for a minimum specified period not exceeding three months.

Member States may allow a period of limited service prior to complete disconnection, during which only calls that do not incur a charge to the subscriber (e.g. ‘112’ calls) are permitted.

3. By 1 March 2010, each home provider shall give to all their roaming customers the opportunity to opt deliberately and free of charge for a facility which provides information on the accumulated consumption expressed in volume or in the currency in which the roaming customer is billed for regulated data roaming services and which guarantees that, without the customer's explicit consent, the accumulated expenditure for regulated data roaming services over a specified period of use does not exceed a specified financial limit.