To use an ACM Certificate with Elastic Load Balancing for the same fully qualified domain name (FQDN) or set of FQDNs in more than one region, you must request a certificate for each region. This means you must revalidate each domain name in the certificate for each region. You cannot copy a certificate between regions.
To use an ACM Certificate with Amazon CloudFront, you must request the certificate in the US East (N. Virginia) region. ACM Certificates provisioned in this region and associated with a CloudFront distribution are distributed to the geographic locations configured for that distribution.