Is there any possibility to lock between policies ?

Question

Let's say there is an S3 bucket, which was created by a User through Cloudformation. And the bucket policy is such that there is an explicit "Deny" to delete the Bucket by anyone, including the Root User.

So, is the bucket locked ? Will the bucket not be deleted by normal means ,
**especially, when the Bucket policy or the IAM policy given to the user) cannot be changed by a developer (who is not an admin) ?**

Answer

> So, is the bucket locked ? Will the bucket not be deleted by normal means , especially, when the Bucket policy or the IAM policy given to the user) cannot be changed by a developer (who is not an admin) ?

If deletion is explicitly prohibited by the bucket policy, the IAM user cannot delete it.  
For example, unless you specify a user who can be deleted using the "Condition" key as shown below, you will not be able to delete it.  
```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Deny",
      "Principal":"*",
      "Action": [
        "s3:DeleteBucket",
        "s3:PutBucketPolicy"
      ],
      "Resource": "arn:aws:s3:::s3-bucket-name",
      "Condition": {
        "StringNotEquals": {"aws:username": "admin"}
      }
    }
  ]
}
```

Is there any possibility to lock between policies ?

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