locale
The locale of the IPAM pool. In IPAM, the locale is the Amazon Web Services Region where you want to make an IPAM pool available for allocations. Only resources in the same Region as the locale of the pool can get IP address allocations from the pool. You can only allocate a CIDR for a VPC, for example, from an IPAM pool that shares a locale with the VPC’s Region. Note that once you choose a Locale for a pool, you cannot modify it. If you choose an Amazon Web Services Region for locale that has not been configured as an operating Region for the IPAM, you'll get an error.