Then, the Agency issued a probation decision to each electricity network company requiring any possible overcharge to be refunded to customers over the following four-year period in network service charges.

If the amount of the overcharge over a four-year period exceeded the reasonable profit by at least 5%, interest was added to the overcharge and credited to the customers. According to the legislation, after two surplus periods of four years, the Energy Authority can initiate a fine procedure and propose a penalty fee to the Market Court. Similarly, a deficit (underpriced) electricity network company may raise the price of the network service by an equivalent amount in the next monitoring period.