Does the Ethics Committee control all of Japan? According to this answer it appears that each of the districts are in each of Japan's Regions

Tomiko, who lives in Kamisu 66 is the head of the Ethics Committee and she wanted Saki, who also lived in Kamisu 66, to take her place one day.

I am wondering if the Ethics Committee's Tomiko is the head of control of all of Japan, or if each region/district has their own Ethics Committee. If the latter, do they all share the same ruleset (particularly regarding the age a child can be terminated being changed to 17 years)?
In the novel, each reason doesn't have communication channel each other.
(Wikipedia describe it too.)
There are no way to control all regions from one ethics committee.

I think the fundamental rules such as got human rights at 17 years old is same, because it's created by scientist group.