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It remains the view of SSAC that the rate of 1000/yr was decided solely for administrative reasons and has no relevance for the security of the root zone. The SSAC’s advice on this topic is captured in SAC100: SSAC Response to the New gTLD Subsequent Procedures Policy Development Process Working Group Request Regarding Root Scaling. The four recommendations, which are still valid as of this date, are: 

(1) ICANN should continue developing the monitoring and early warning capability with respect to root zone scaling. 

(2) ICANN should focus on the rate of change for the root zone, rather than the total number of delegated strings for a given calendar year. 

(3) ICANN should structure its obligations to new gTLD registries so that it can delay their addition to the root zone in case of DNS service instabilities. As stated in SAC100, “...ICANN should study the possibility of backing out, or undoing, changes to the root zone should complications with a change arise. This recommendation and the latter proposed study (see recommendation 4 below) should be completed prior to increasing the number of delegations in the root zone.”

(4) ICANN should investigate and catalog the long term obligations of maintaining a larger root zone.

The SSAC went on to point ICANN org to SAC103, SSAC Response to the new gTLD Subsequent Procedures Policy Development Process Working Group Initial Report. 

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