title: AWS ELB OperationNotPermitted when calling the ModifyRule operation
body: <p>I am trying to do a blue green deployment through a python script, however when ever I run the following piece of code </p>
  
  <pre><code>modifyOnBeta = elb_client.modify_rule(
      RuleArn=betarulearn,
      Actions=[
          {
              'Type': 'forward',
              'TargetGroupArn': live_target_group
          }
      ]
  )
  </code></pre>
  
  <p>I get the following error </p>
  
  <pre><code>botocore.errorfactory.OperationNotPermittedException: An error occurred (OperationNotPermitted) when calling the ModifyRule operation: Default rule 'arn:aws:elasticloadbalancing:us-east-1:XXXXXXXXXXXX:listener-rule/app/some-alb/XXXX/XXXX/XXXX' cannot be modified
  </code></pre>