4.The buyer shall apply for payment under the single payment scheme in accordance with Article 12, adding to his application a copy of the sales contract.

In the case of the single buyer procedure, Member States shall designate a legal person to be the single buyer within the territory covered by the system operator.

Whereas a single buyer must operate separately from the generation and distribution activities of vertically integrated undertakings;

whereas the flow of information between the single buyer activities and these generation and distribution activities needs to be restricted;

Member States shall ensure that there is no flow of information between the single buyer activities of vertically integrated electricity undertakings and their generation and distribution activities, except for the information necessary to conduct the single buyer responsibilities.

Member States which designate as a single buyer a vertically integrated electricity undertaking or part of a vertically integrated electricity undertaking shall lay down provisions requiring the single buyer to operate separately from the generation and distribution activities of the integrated undertaking.

In the latter case, there would be no obligation for the single buyer to publish a non-discriminatory tariff for the use of the transmission and distribution system.

The single buyer may be obliged to purchase the electricity contracted by an eligible customer from a producer inside or outside the territory covered by the system at a price which is equal to the sale price offered by the single buyer to eligible customers minus the price of the published tariff referred to in paragraph 1 (i).

The single buyer may refuse access to the system and may refuse to purchase electricity from eligible customers where he lacks the necessary transmission or distribution capacity.

'single buyer` shall mean any legal person who, within the system where he is established, is responsible for the unified management of the transmission system and/or for centralized electricity purchasing and selling;

In the event of cross-border disputes, the dispute settlement authority shall be the dispute settlement authority covering the system of the single buyer or the system operator which refuses use of, or access to, the system.

If the purchase obligation under paragraph 2 is not imposed on the single buyer, Member States shall take the necessary measures to ensure that the supply contracts referred to in paragraph 1 (ii) and (iii) are implemented either via access to the system on the basis of the published tariff referred to in paragraph 1 (i) or via negotiated access to the system according to the conditions of Article 17.

4.The buyer shall apply for payment under the single payment scheme in accordance with Article 12, adding to his application a copy of the sales contract.

Under the heading of "single branding" come those agreements which have as their main element that the buyer is induced to concentrate his orders for a particular type of product with one supplier.