{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "ec2:CreateVpc",
                "ec2:AssociateVpcCidrBlock"
            ],
            "Resource": "arn:aws:ec2:*:*:vpc/*",
            "Effect": "Deny",
            "Condition": {
                "StringNotEquals": {
                    "ec2:Ipv4IpamPoolId": ""
                }
            }
        }
    ]
}