Disallow internet access for an Amazon Virtual Private Cloud (VPC) instance managed by a customer, rather than by an AWS service

aws-scp-vpc-internet.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "GRDISALLOWVPCINTERNETACCESS",
      "Effect": "Deny",
      "Action": [
        "ec2:CreateInternetGateway",
        "ec2:AttachInternetGateway",
        "ec2:CreateEgressOnlyInternetGateway",
        "ec2:AttachEgressOnlyInternetGateway",
        "ec2:CreateDefaultVpc",
        "ec2:CreateDefaultSubnet",
        "ec2:CreateCarrierGateway"
      ],
      "Resource": [
        "*"
      ],
      "Condition": {
        "ArnNotLike": {
          "aws:PrincipalArn": [
            "arn:aws:iam::*:role/AWSControlTowerExecution"
          ]
        }
      }
    }
  ]
}