Prerequisite for contracting operator services is submitting a request for capacity reservation that the energy entity with the legal right to access the gas storage system submits to the operator on published forms, and in accordance with the deadlines prescribed by the Storage Code (Offical Gazette 50/18) and Amendments to the Storage Code (Offical Gazzete 26/20, 58/21 and 111/22).

System Operator, in accordance with Article 40 of the Storage Code, publishes relevant information for contracting the SBU service from 2026, April 1 till 2031, March 31.
1. Allocation of the standard bundled units

After receiving the request for the reservation of SBU, the Storage System Operator conducts a SBU allocation procedure according to previously defined regulations prescribed in the published the Storage Code - (Official Gazette No. 50/18) (unofficial translation) , the Amendments of the Storage Code (Official Gazette No. 26/20) (unofficial translation) and Amendments of the Storage Code (Official Gazette No. 58/21) (unofficial translation).
 
The Operator shall submit to the Applicant the Standard Storage Agreement with the corresponding Contracted Service Confirmation within ten days from the day of delivery of the notification on the number of allocated SBUs, which the Applicant is obliged to sign and return to the Operator within ten days from the day of receipt

If there are any unallocated standard bundled units on an annual basis, or if the Operator doesn’t receive within the prescribed deadline the offered Agreement for contracting the standard bundled unit service, together with the requested payment security instruments, the Operator can offer the aforementioned capacities on the market in accordance with Storage Code as a firm service or as a new product package. 


2. Reservation of firm individual services  
 
The Storage System Operator has free capacities for contracting individual service of firm injection capacity in accordance with the information published on the page 4.1. Primary market.
The Storage System Operator currently does not have the capacity to offer firm individual services of working volume or withdrawal capacity.
 
The Request for the reservation of an individual service of firm injection capacity for available injection capacity announced by the Storage System Operator on the day of submitting the reservation Request may be submitted only by Applicants who have contracted working volume in the gas storage system.
 
Deadlines for booking firm individual services:
 

For the contract of   individual firm services   for a term	Announcement of   necessary information on   available services	Deadline to submit a Request for reservation   of firm individual services
Yearly	September 10 for the next   storage year	Till September 25 of the current storage year for the next storage year
Monthly	No later than the fifth day of   the current month for the   following month(s)	Up to the tenth day of the current month for the   following month (s) (maximum by the end of the   storage year)
Daily*	Until 9:00 AM on the current   day for the next gas day(s)	By 9:30 AM on the current day for the next gas day

 
 
 
 
 
 








*The Request for the reservation of a firm individual service for a non-working day and the first following working day after the non-working day is submitted during the working day immediately preceding the non-working day.
 
Additional deadlines for the Storage System Operator and the Applicant for the reservation firm individual service, related to the contracting of firm individual injection capacity on a daily basis are contained in the form of the Request for reservation of firm individual services.
The Request for the reservation of a firm individual service is a binding offer of the Applicant.
The procedure for the allocation of firm individual services is defined in Addendum 4 of the Storage code.

 
3. Reservation of interruptible not-nominated capacities

The request for the reservation of interruptible not-nominated injection capacity and the request for the reservation of interruptible not-nominated withdrawal capacity on a daily basis is submitted on published forms at least 2 (two) business days before using the service.

• Interruptible not-nominated injection capacities and interruptible not-nominated withdrawal capacities on a daily basis will be allocated upon request to each User who has contracted SBU.
• The delivery of the Request for the reservation of interruptible not-nominated injection capacity and/or interruptible not-nominated withdrawal capacity on a daily basis is a binding offer by the Storage System User for contracting the interruptible not-nominated capacity service.

The Storage System Operator is obliged to notify the Storage System User on the allocation of interruptible not-nominated injection capacity and/or not-nominated withdrawal capacity on a daily basis 2 (two) days before the service is used and deliver to him a Contracted Service Confirmation - Injection and/or Contracted Service Confirmation - Withdrawal on the basis of which he achieves the right to nominate interruptible not-nominated capacities.