Going back to one of my previous responses, these schemes—the confirmation of service demand and the production orders—are to be used with co-operative third parties that police have long-standing relationships with. If a service provider is not co-operative, police have other tools they can get. They could get a production order that compels, or they can get a warrant that authorizes them to do the work themselves. There are other means of doing this.
Again, this is a tool to be used with co-operative third parties. It provides those third parties with a piece of paper that indemnifies them because they're responding to a state request. It satisfies their needs and hopefully satisfies the police's needs as well.