Summary

  • ARIN-2023-1 names Brian Jones and Kaitlyn Pellak as its shepherds. It retired section 4.2.1.4, “Slow Start,” a limit on the pace of IPv4 allocations that ARIN staff said they had not used since 2018.
  • The Board adopted the change on 3 June 2024; NRPM 2024.1 took effect on 21 August. The current manual labels 4.2.1.4 “[Retired].”

For six years, ARIN's rulebook carried a working-looking switch that no one at the registry was flipping. The switch was called “Slow Start.” When IPv4 addresses still came out of a free pool, it constrained the rate at which ARIN issued allocations. The pool ran out, transfers became the working path, and staff last used the rule in 2018. The paragraph stayed. Bureaucratic ghosts rarely haunt castles; they prefer numbered subsections.

Brian Jones helped send this one away. With Kaitlyn Pellak, he shepherded ARIN-2023-1, a proposal whose operative instruction was almost comically short: retire 4.2.1.4. The policy record says Slow Start had served for about two decades. It also records staff confirmation that the mechanism had fallen out of use. Those two facts give the deletion its shape. The old rule had earned its place. Then the circumstances that justified it changed faster than the page.

Jones presented the proposal at ARIN 52. In the published meeting transcript, he described the post-exhaustion shift and the 2018 end of use. A participant asked whether deletion would alter the pace of allocations. Jones expected no operational effect; ARIN's John Sweeting said the registry had no current use for Slow Start. The November 2023 staff review reached the same practical conclusion: no impact on registry operations, with public-documentation updates as the implementation work.

The policy record supplies a second clock. The proposal arrived in April 2023, became a draft in May, and reached the Board in June 2024. In other words, the formal process took another year after someone finally proposed clearing a rule that operations had already left behind. That sequence makes the delay visible without blaming an applicant, a staff member or a single meeting. The document itself carried the old switch while the public process worked through its removal.

The Board adopted the retirement on 3 June 2024. ARIN's August implementation notice put it into NRPM 2024.1, effective 21 August. Today 4.2.1.4 is marked “[Retired]” in the live manual. The real-world workflow and the public text finally share a date on the same calendar.

This is a small policy victory with a useful sting. A rulebook tells operators what the registry can require. When obsolete text lingers, readers have to guess which instructions still bite. Jones's deletion removed that guess from one corner of IPv4 policy. The ghost did no work; evicting it did.