Use the `aws_route_tables` InSpec audit resource to test properties of all or a group of Route Tables. A Route Table contains a set of rules, called routes, that are used to determine where network traffic is directed.
Your [Principal](https://docs.aws.amazon.com/IAM/latest/UserGuide/intro-structure.html#intro-structure-principal) will need the `ec2:DescribeRouteTables` action with Effect set to Allow.
You can find detailed documentation at [Actions, Resources, and Condition Keys for Amazon EC2](https://docs.aws.amazon.com/IAM/latest/UserGuide/list_amazonec2.html).