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TAR NC Implementation Document – Second Edition September 2017 |
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INFORMATION FOR PUBLICATION BEFORE
THE TARIFF PERIOD
Responsibility: publication by TSO/NRA, as NRA decides
Set of information for publication
Four blocks illustrate the set of information to publish before the tariff period:
(1) methodology parameters related to technical characteristics of the transmission
system; (2) TSO revenue information; (3) transmission and non-transmission tariffs,
which are not published before the annual yearly capacity auctions; and (4)
additional information related to tariff evolution. Such information needs to be
published for all points on the transmission network. (See figure 35 on the following
page)
Tariff changes, trends and tariff model
Figure 35 shows ‘other’ information that needs to be published before the tariff
period, comprising information on tariff changes, tariff trends and at least a simpli-
fied tariff model. Such information only concerns transmission tariffs.
Tariff model:
Annex R provides examples of a simplified tariff model. As for the
information on tariff changes/trends, the TAR NC provides stakeholders with the
opportunity to understand:
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The derivation of tariffs – an explanation of the reasons why tariffs changed as
compared to the past (tariff changes);
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The future evolution of tariffs – an explanation of the reasons why tariffs may
change in future, based on the best estimates (tariff trends).
ENTSOG received stakeholder feedback that the tariff model should be updated at
least on a quarterly basis with the information on the current status of under-/over-
recovery. ENTSOG believes that such quarterly updates of the tariff model should
only be optional as the TAR NC only obliges the tariff model to be published before
the tariff period. ENTSOG notes that publishing information on under-/over-recovery
more frequently than before the tariff period may be misleading as it does not
provide the complete picture referring to the whole tariff period.
Also, from the stakeholder perspective, such under-/over-recovery referring to a
given portion of the tariff period will be a significant driver for tariff changes for the
following tariff period. ENTSOG notes that such under-/over-recovery may not
influence the tariff levels for the next tariff period as the duration of the reconciliation
period may not coincide with the duration of the tariff period. Moreover, publishing
information on under-/over-recovery relevant for a given portion of the tariff period
may lead to an impression that the tariffs for the prevailing tariff period are subject
to change whereas such changes are only permissible in exceptional circumstances.
ENTSOG highlights that the way the regulatory account is reconciled and the
reconciliation period duration are subject to national decision.
ARTICLE 30