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With regard to the implementation of provisions concerning the consolidation stage referred to in TIDE, GME, in agreement with Terna, informs market participants that the go-live is confirmed for 1 February 2026 (day of flow).

1. MAKING AVAILABLE THE NEW IDENTIFICATION DATA OF UNITS

The consolidation stage of TIDE provides, in particular, that all the types of units other than UASs, UnAPs, and units corresponding to cross-border trades will be created under the new criteria referred to in TIDE and that, consequently, they will adopt a new coding (new identification data).

To enable market participants to verify the new identification data of units (namely, the identification codes of units/portfolios to which bids/offers and nominations must refer), which will enter into force as of the day of flow of 1 February 2026, the new identification data will be made available on the various platforms according to the following procedures and timing:

- MGP, MI-A (IPEX platform):

1. the new identification data of units will be available from 26 January 2026 and, from that date on, the units will be attributed to the respective BRP. Therefore, from 26 January on, market participants may submit bids/offers into the MGP, which will be valid for the day of flow of 1 February 2026 only on portfolios consisting of the new units that they hold as BRPS;
2. the delegations on the new units, valid from the day of flow of 1 February 2026, will be available from 29 January 2026 and, from that date on, the units will be attributed to the respective BRP or to the delegated market participant. Therefore, from 29 January on, markets participants may submit bids/offers into the MGP, which will be valid for the days of flow of 1 February 2026 and subsequent days even on portfolios consisting of the new units that they hold as delegated market participants;

- MI-XBID:

1. the new identification data of units and the delegations on the new units, valid from the day of flow of 1 February 2026, will be available from 31 January 2026 at 15:30 and, from that time on, the units will be attributed to the respective BRP or to the delegated market participant;

- Nomination Platform (new platform)

1. the registration of nominations for the days of flow of 1 February 2026 and subsequent days must be made on a new Nomination Platform, which will be available from 26 January 2026 at the following addresses:
1. platform: https://ns.ipex.it/nsweb
2. webservice: https://ns.ipex.it/nsws/service.asmx
2. the new identification data of units will be available from 26 January 2026 and, from that date on, the units will be attributed to the respective BRP;
3. the delegations on the new units, valid from the day of flow of 1 February 2026, will be available from 27 January 2026 and, from that date on, the units will be attributed to the respective BRP or to the delegated market participant;
4. the margins of withdrawal UVZs, valid from the day of flow of 1 February 2026, must be set by the respective BRPs by using the appropriate option available on the new Nomination Platform from 26 January 2026. In this regard, it is worth specifying that the margins may be loaded (via the XML file upload option) in the same format as the current one. Only for the units under delegation whose BRP is not at the same time a market participant, the notification of the margins to be set on withdrawal UVZs must be made by the delegated market participant, by transmitting to GME the appropriate form (link), duly completed by the delegating BRP. The margins valid on withdrawal UVZs from the day of flow of 1 February 2026, as set via the Nomination Platform, will be made available on IPEX from 15 to 18 on 30 January 2026. After this deadline, the margins set via the Nomination Platform will be concurrently transferred to and visible on IPEX;

- PCE:

1. the new identification data of units will be available from 26 January 2026 and, from that date on, the units will be attributed to the respective BRP;
2. the delegations on the new units, valid from 1 February 2026, will be available from 27 January 2026 and, from that date on, the units will be attributed to the respective BRP or delegated market participant.

2. CHANGES TO THE PLANNING OF MARKET SESSIONS AND ACTIVITIES ON 31 JANUARY 2026

To maximise operational security, the planning of market sessions and activities on 31 January 2026 will be changed as follows.

On 31 January 2026 (calendar day):

1) the following market sessions and activities will be changed:

2) the MI-XBID platform, which currently incorporates the options of the Nomination Platform, will be unavailable starting at 13:03, in order to enable system updates. Starting at 15:30, the MI-XBID platform will be available again, with the updated unit identification data, for all the activities in respect of the days of flow of 1 February 2026 and subsequent days, and related only to MI-XBID trading. It is worth stressing again that the nomination activities for the days of flow of 1 February and subsequent days must necessarily be made via the new Nomination Platform mentioned in the previous paragraph.

All the market sessions and activities not mentioned in the previous points will proceed as normal, in accordance with the ordinary procedures and timing, as set forth in the Integrated Text of the Electricity Market Rules, the PCE Rules, and the related Technical Rules.

ADDITIONAL OPERATING PROVISIONS

Bids/offers and other data entered by market participants into the market platforms before 31 January 2026 and pertaining to the days of flow of 1 February 2026 and subsequent days will remain valid, provided that they refer to units not involved in identification data changes.

GME and Terna will communicate any change to the above-reported switching plan by using the usual communication channels.

Finally, with a view to facilitating the implementation of the new provisions by Electricity Market and PCE participants, GME has made available (solely for information purposes) the set of the main updated documents in the TIDE section of its website.

The updated version of the Implementation Guide will be made available shortly on the homepage of the live IPEX platform; the Guide has been changed to take into account the interaction with the new Nomination Platform. The formats currently used will not be changed.

Below is a list, provided solely for information purposes, of the updated versions of the Technical Rules that will enter into force as of the day of flow of 1 February 2026:

1. Technical Rule no. 11 ME - Market time interval and imbalance settlement period
2. Technical Rule no. 05 MPE - Products tradable in the MGP and MI, number of multiple bids/offers in the MGP, MI-A, and MSD, and maximum number of block bids/offers in the MGP and MI-A
3. Technical Rule no. 08 MPE - Methods for calculating the margins for the purposes of the MGP and MI by GME in the event of non-receipt
4. Technical Rule no. 10 MPE - Checks of technical adequacy of bids/offers with respect to margins
5. Technical Rule no. 21 MPE - Procedures for submitting requests for registration of  nominations, and cases of implicit nomination
6. Technical Rule no. 22 MPE - Verification of validity and adequacy of requests for registration of nominations, determination and communication of nominations
7. Technical Rule no. 23 MPE - Units and aggregations of units for injection, withdrawal, and provision of ancillary and redispatching services

For additional information, please contact:

salamercato@mercatoelettrico.org