Comment by CKN23-ARIN

There are five regulatory bodies managing it. Six, if you count IANA.

https://www.icann.org/resources/pages/allocation-ipv4-rirs-2...

https://afrinic.net/policy/manual

https://www.arin.net/participate/policy/nrpm/

https://www.apnic.net/community/policy/

https://www.lacnic.net/1033/2/lacnic/policies

https://www.ripe.net/publications/docs/ripe-policies