# Tagging an AutoScaling Group (ASG) with CloudFormation for Accelerate
<a name="acc-tag-cf-ex-tag-asg"></a>

The following is an example of how you can apply the tag **ams:rt:ams-managed** with the value **true** to an Auto Scaling group managed by CloudFormation. Note that the Auto Scaling group will propagate its tags to Amazon EC2 instances that are created by it. The **ams:rt:ams-managed** tag opts you in to having your resources monitored by AMS Accelerate.

```
  Type: AWS::AutoScaling::AutoScalingGroup
Properties: 
  AutoScalingGroupName: "SampleASG"
  
  # ...other properties...
  
  Tags: 
    - Key: "ams:rt:ams-managed"
      Value: "true"
```