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1. Prices Prices shall be those charged to household and final non-household customers buying natural gas for their own use that is distributed through mains.

2. Natural gas Natural gas shall include natural gas and other gaseous fuels blended with natural gas in the transmission and distribution network, such as biogas. Other gaseous fuels that are distributed through dedicated networks without being blended with natural gas (e.g. gas works gas, coke oven gas, blast furnace gas and biogas) shall be excluded.

3. Reporting units The data shall include all household and final non-household customers of natural gas, but shall exclude customers who use natural gas only for:

— electricity generation in power plants or in combined heat and power (CHP) plants; or — non-energy purposes (e.g. for use in the chemicals industry).

4. Units of measurement Prices shall be the national average prices charged to household and final non-household customers.

Prices shall be expressed in national currency per gigajoule (GJ). The unit of energy used shall be measured on the basis of the gross calorific value (GCV). Prices shall be weighted according to the market share of natural gas supply undertakings in each consumption band. If it is not possible to calculate weighted average prices, arithmetic average prices may be provided. In either case, the data shall cover a representative share of the national market.

5. Consumption bands Prices shall be based on a system of standard annual natural gas consumption bands.

(a) For household customers, the following bands shall be applied: Consumption band Annual natural gas consumption (GJ) Minimum Maximum Band D1 < 20 Band D2 ≥ 20 < 200 Band D3 ≥ 200 (b) For final non-household customers, the following bands shall be applied: Consumption band Annual natural gas consumption (GJ) Minimum Maximum Band I1 < 1 000 Band I2 ≥ 1 000 < 10 000 Band I3 ≥ 10 000 < 100 000 Band I4 ≥ 100 000 < 1 000 000 Band I5 ≥ 1 000 000 < 4 000 000 Band I6 ≥ 4 000 000 6. Level of detail

Prices shall include all charges payable: network charges plus energy consumed, minus any rebates or premiums, plus any other charges (e.g. meter rental, standing charges). Initial connection charges shall be excluded. Detailed data shall be transmitted as specified below.

(a) Level of detail required for components and sub-components Prices shall be subdivided into three main components and into separate sub-components. The final customer price for natural gas by consumption band is the sum of the three main components: the energy and supply component, the network component (transmission and distribution) and the component comprising taxes, fees, levies and charges.

1. Average relative share of transmission costs for household customers and average relative share of transmission costs for final non-household customers, expressed as a percentage of total network costs

2. Average relative share of distribution costs for household customers and average relative share of distribution costs for final non-household customers, expressed as a percentage of total network costs. Taxes, fees, levies and charges This component is the sum of all the sub-components (taxes, fees, levies and charges) listed below. Sub-component The following sub-components shall be transmitted as individual items for each consumption band defined in point 5 1. Value added tax as defined in Council Directive 2006/112/EC 2. Taxes, fees, levies or charges relating to the promotion of renewable energy sources, energy efficiency and CHP generation 3. Taxes, fees, levies or charges relating to strategic stockpiles, capacity payments and energy security; taxes on natural gas distribution; stranded costs and levies on financing energy regulatory authorities or market and system operators 4. Taxes, fees, levies or charges relating to air quality and for other environmental purposes; taxes on emissions of CO2 or other greenhouse gases

5. All other taxes, fees, levies or charges not covered by any of the previous four categories: support for district heating; local or regional fiscal charges; island compensation; concession fees relating to licences and fees for the occupation of land and public or private property by networks or other devices.

(b) Level of detail based on taxation Prices shall be broken down into the following three levels: Level Description Prices excluding all taxes, fees, levies and charges This price level shall include only the energy and supply component and the network component. Prices excluding value added tax (VAT) and other recoverable taxes This price level shall include the energy and supply component, the network component and taxes, fees, levies and charges considered as non-recoverable for final non-household customers. For household customers this price level shall include the energy and network components and taxes, fees, levies and charges but excludes VAT. Prices including all taxes This price level shall include the energy and supply component, the network component, and all recoverable and non-recoverable taxes, fees, levies and charges, including VAT.

7. Consumption volumes Member States shall transmit information on the relative share of natural gas in each consumption band based on the total volume to which the prices refer. The annual consumption volumes for each consumption band shall be transmitted once per year, together with the price data for the second semester. The data shall not be older than two years.