The National Control Commission for Prices and Energy by its Resolution No. O3-698 as of 30 December 2015 approved AB Amber Grid Natural Gas Transmission System Balancing Rules (See Rules.pdf).

For every Balancing Period (i.e. on a daily basis) natural gas market participants shall balance their quantities of natural gas incoming into the gas transmission system with the ones taken out of the gas transmission system. Where natural gas market participants cause imbalance to the system, they shall either buy gas from the Transmission System Operator or sell gas to the Transmission System Operator, depending on whether they caused shortage or excess of gas in the Transmission System. The gas market participants in question shall either buy the balancing gas quantity at a marginal buying price or shall sell the balancing gas quantity at the marginal selling price. The value of the marginal buying price shall be deemed to equal the higher balancing gas price (over the balancing period) between the highest price at which, in the course of the balancing period, the Transmission System Operator bought and/or sold gas under the valid bilateral gas procurement contract and/or average price of gas traded on the Gas Exchange based on the balancing period as published by the Market Operator. Marginal selling price is the lower price of the balancing gas (during the balancing period) between the lowest gas price at which (during the balancing period) the Transmission System Operator bought /or sold gas under a bilateral gas sale and purchase contract and/or at the Natural Gas Exchange and the average price of gas traded on the Natural Gas Exchange (during the balancing period) as published by the Market Operator.

Any imbalance amounts exceeding allowed tolerance limits shall be subject to the payment of an Imbalance Payment. From October to April the allowed tolerance limit shall be 5 percent, whereas from May to September the allowed tolerance limit shall be 15 percent. Where a market participant causes gas shortage in the system, the Imbalance Payment shall amount to 10 percent of the marginal buying price of the balancing gas quantity and vice versa where a market participant causes gas surplus in the system, the Imbalance Payment shall amount to 10 percent of the marginal selling price of the balancing gas quantity.

Where market participants cause imbalance and where the Transmission System Operator does not have sufficient gas resources available to ensure a proper operation of the Gas Transmission System, the Transmission System Operator shall buy/sell respective quantities of balancing gas either on the Natural Gas Exchange and/or according to bilateral contracts. The Transmission System Operator shall run its trade in balancing gas on the Natural Gas Exchange in accordance with the applicable provisions of the Natural Gas Exchange Regulation.

According to AB Amber Grid Natural Gas Transmission System Balancing Rules, information about of the system users‘ balancing status shall be supplied  in separate balancing accounts opened for each individual system user.
 

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