terra-test/000000000000/templates/asume_role_policy.tpl

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "sts:AssumeRole"
      ],
      "Resource": "arn:aws:iam::${prod_account_id}:role/role_c"
    }
  ]
}