I am trying to write a policy that check if mandatory labels exists.

my sample json looks like this

{
   "labels":{
      "department":"it_transformation",
      "description":"for-sdp-developers",
      "environment":"dev",
      "owner":"gaurang",
      "owner_email":"[email protected]",
      "project_code":"111",
      "req-num":"xxx-111"
   }
}

I want to check it contains owner, owner_email and project_code.

Currently this is what my policy looks like

deny[msg] {
    lables_set := {e | e := [_]}
    resource := input.resource_changes[_]
    not resource.change.after.labels.owner
    resource.change.actions[_] != "no-op"
    # contains(resource.change.actions, "no-op")
    msg := sprintf("New resource '%v' must have a 'owner' label.", [resource.change.after.dataset_id])
}

is there a way I can write some loop, rather than duplicating this block multiple times?