prevent-3rd-party-amis.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PreventMarketplaceImages",
            "Action": [
                "ec2:RunInstances"
            ],
            "Effect": "Deny",
            "Resource": "arn:aws:ec2:*::image/ami-*",
            "Condition": {
                "StringNotEquals": {
                    "ec2:Owner": "${aws:PrincipalAccount}"
                }
            }
        },
        {
            "Sid": "PreventCopyImages",
            "Action": [
                "ec2:CopyImage"
            ],
            "Effect": "Deny",
            "Resource": "*",
            "Condition": {
                "StringNotEquals": {
                    "ec2:Owner": "${aws:PrincipalAccount}"
                }
            }
        }
    ]
}