The COP, by decision 1/CP.16, decided that developed country Parties should enhance reporting in
national communications (NCs) and submit biennial reports (BRs), which outline progress in achieving
emission reductions and the provision of financial, technology and capacity-building support to
non-Annex I Parties, building on existing reporting and review guidelines, processes and experiences.
Decision 1/CP.16 also established a new process, international assessment and review (IAR), under the
Subsidiary Body for Implementation (SBI) for developed country Parties that aims to promote the
comparability of efforts among all developed country Parties with regard to their quantified
economy-wide emission limitation and reduction targets <<MORE>>.
The detailed guidelines for the preparation of BRs contained in annex I to decision 2/CP.17 were
adopted by COP 17 in Durban.
Reporting of biennial reports
Following provisions of decision 2/CP.17 developed country Parties were requested to submit their BR1
to the secretariat by 1 January 2014 and the second and subsequent BR two years after the due date of
a full NC (i.e. 2016, 2020). They have two options to report information in the BR1: Parties could
present the BR1 as an annex to the NC or as a separate report.
In response to request for guidance on reporting of NC and BR by a number of Parties the
secretariat has analysed the information which is required to be presented in the BR and NC,
identified the areas of overlaps and suggested an approach as to how these overlaps could be
avoided. When a Party chooses to present its BR as an annex to the NC, it may choose to avoid
duplication of information on similar topics by following two approaches: (1) detailed reporting of
the information on the similar topics in the NC, and cross-referencing to summary of this information
in the BR or (2) provision of summary information on such similar topics in the NC and
cross-referencing to detailed information being provided in the BR. Notwithstanding the differences
in these two approaches, the BR when presented as an annex to the NC, should be possible to be read
as a stand-alone document and should meet all requirements of the UNFCCC biennial reporting
guidelines for developed country Parties (Annex, decision 2/CP.17).
When a Party chooses to report its BR and NC as separate reports, the reader-friendliness could
be enhanced by indicating which parts are similar in both reports. In any case, provision of
complete, transparent, accurate, comparable and consistent information in the BR and the common
tabular format is an essential reporting requirement.
Biennial reporting common tabular format
The Conference of the Parties, in decision 19/CP.18, requested the UNFCCC secretariat to
develop an electronic reporting application for the common tabular format (BR CTF) for developed
country Parties. The BR CTF application has been released in 2013, for use by Parties to report
their first BR CTF of BRs. The secretariat is continuously improves the BR CTF application
taking into account provisions of the relevant decisions and relevant suggestions by the Parties.
Compilation and synthesis reports
Following the request by the COP (decision 2/CP.17, para 21), the secretariat prepares compilation and synthesis
(C&S) reports of the information provided in the BRs by developed Parties. The report
highlights findings on quantified economy-wide emission reduction targets; progress made towards
their achievement, including information on mitigation actions and their effects, the estimates of
emission reductions and removals and the use of units from market-based mechanisms and LULUCF
activities; greenhouse gas (GHG) emission trends and projections; and the provision of
financial, technological and capacity-building support to developing country Parties.
latest C&S report of BR2s will be presented for consideration at SBI 45, Marrakesh,
As outlined in annex II of decision 2/CP.17, the IAR process includes a technical
review of BRs, where relevant in conjunction with the annual GHG inventories, and NCs of developed
country Parties, which will result in an individual review report for each developed country Party.
When the BRs are submitted in the same year as the NCs, the reviews are conducted in conjunction,
in-country. When BRs are not submitted in the same year as the NCs, the reviews are conducted
through centralized reviews. The technical reviews are conducted by an international team of experts
from Annex I and non-Annex I Parties, selected from the Roster of Experts.
BR and NC lead reviewers meetings
In accordance with the “Guidelines for the technical review of information
reported under the Convention related to GHG inventories, BRs and NCs by Parties included in Annex I
to the Convention” included in annex to decision 23/CP.19, the secretariat shall facilitate
annual meetings of the lead reviewers (LRs) for GHG inventories, BRs and NCs. The outcomes of
the lead reviewers meetings should facilitate the work of the LRs in fulfilling their task to ensure
consistency in the reviews across the Parties. LRs shall collectively prepare an annual report to the
Subsidiary Body for Scientific and Technological Advice containing suggestions on how to improve the
quality, efficiency and consistency of the reviews.