Updated 5th Draft SLA for the IANA Numbering Services


17 March 2016


On 15 January 2015, the Consolidated RIR IANA Stewardship Proposal (CRISP) Team submitted the Internet Number Community Proposal to the request for proposals issued by the IANA Stewardship Coordination Group (ICG).

One of the key elements of the Internet Number Community proposal is to replace the current NTIA IANA agreement with a new contract, a Service Level Agreement (SLA), between the IANA Numbering Services Operator and the five RIRs.

A first draft of the SLA was published on 1 May 2015 and opened for public comments until 14 June 2015. The first draft of the SLA is available at:


A second draft of the SLA was published on 6 August 2015 and opened for public comments until 31 August 2015. The second draft of the SLA is available at:


A third draft of the SLA was published on 30 October 2015 and invited ICANN legal staff to provide comments by November 30th 2015. The third draft of the SLA is available at:


A fourth draft of the SLA was published on 25 February and invited ICANN to move forward to signing the SLA. The fourth draft of the SLA is available at:


Fifth Draft SLA

As a result of ICANN comments on the fourth draft and additional feedback received at meetings during ICANN 55 in Marrakech, a fifth draft of the SLA has been produced and is available at:


The SLAv5 is open for public comments. Comments can be sent to IANAXFER mailing list at https://www.nro.net/mailman/listinfo/ianaxfer. The deadline for comments is April 15th 2016.

For the sake of clarity, you can find a track changes version of SLAv5 against the fourth draft at:


Additionally, a document with the comments on SLAv5 and the legal team responses is available at:


In accordance with the transparency commitment to our the community, we share the exchange of a clear track of comments between ICANN and RIR staff working towards a final SLA document.

About the Fifth Draft SLA

The fifth draft of the SLA has been developed by a team consisting of individuals from different RIRs. It responds to the principles included in the Internet Number Community proposal and is based on the already existing provisions of the NTIA IANA agreement. The content of SLAv5 is the result of consideration of public comments received during the public comment period on the second draft SLA,informational meetings with ICANN staff regarding the operational provisions of the SLA, and ICANN’s written comments regarding the third and fourth draft SLA. It is written in such a way that it can be signed as part of the implementation of the IANA transition when this occurs or before, without pre-judging the outcome of the ICG coordinated proposal.

The SLA includes legally important provisions, such as those that regulate the five RIRs collective actions and responsibilities in its dealings with ICANN under the SLA. It also includes background and definitions.

The SLA also includes explanatory footnotes that reference the source of each article according to the Internet Number Community proposal principles or the NTIA IANA agreement.

Next Steps

The RIRs thank the community and ICANN staff for its thoughtful comments and now publish this SLAv5 in the interest of transparency and keeping the community apprised of progress being made on the SLA. We trust that all comments and concerns have been addressed and that the current draft, SLAv5, represents a mutually acceptable SLA that is consistent with the principles found within the Internet Number Community proposal. We invite public comments as we approach the final version, which will be signed with ICANN/IANA as part of the IANA Transition planning process and will take effect upon release of their existing agreement with NTIA.

Last modified on 22/03/2016