Regulatory power, ie mFRR, is used to manually maintain the balance (and thus the frequency) of the overall power system and is traded on the Nordic Operational Information System (NOIS). In the regulating power market, players can bid for up and down adjustments during the operating hours. There are two possibilities for participation in the market. Either the player has received payment to be available with manual reserves, (see reserves), in which case the actor is required to submit bids for up-regulation for a fixed time period. The player is compensated by an overdue payment in addition to the energy price of active- Introduction to system services. Alternatively, the player may voluntarily issue regulatory power when the actor finds it attractive. Regulatory power bids as a result of a contract for manual reserves must be submitted to the Ener line by noon. 17:00 the day before the day of operation. Participants who volunteer in the market can do this until 45 minutes before the operating hours. Tenders must be submitted for the easy-to-operate operating hours and be at least 10 MW up or down. During the operating hours, up and down control budgets are activated as necessary by the Control Center at Energinet. A marginal hourly rate (RK) will then be created according to the same principles as in the spot market, whereby all activated bids will receive the same settlement price per MWh delivered. Regulatory power prices are the same in all Nordic price ranges, provided there are no bottlenecks. Bottlenecks instead calculate area prices as in the spot market. Regulatory power bids can be activated for less than one hour, however, players are guaranteed a driving time of at least 30 minutes. Upon settlement, Energinet pays for the delivered energy, ie. The area under the delivery curve at the relevant hour, so that the compensation is in line with the actual benefit.