Context For each date and each Programme Time Unit (PTU), the graph and the table entitled "Ladder size ≤ 15 minutes" show all bids of regulating and reserve capacity with a dispatch time of ≤ 15 minutes offered to TenneT. When The information is published daily at 14 hrs, for each PTU of the following day (D-1). Unit The information is shown in MW. Update The volume and/or price of regulating and reserve capacity bids may be changed between the moment of authorisation on the day of preparation until one hour before the PTU in which the bid is to be executed. During this period, bids may also be cancelled and new bids may be submitted. This web page is updated once every 15 minutes. Availability The information will be online available for 2 years. The information on Ladder size ≤ 15 min can be consulted by selecting a by selecting a date via the pool down menu of by entering a date (mm-dd-yyyy). Historical data No historical data is available before the 18th of May 2009. Data before the 18th of May 2009, can be found here Publication requirement In publishing this information TenneT is implementing section 4.4.1 of the "Report on Transparency".