I believe selective enforcement is a core part of policing in the US. No police agency has enough resources to go after everybody who breaks the law, so they make examples of high profile defendants to deter others.
There is no reasonable interpretation of selective enforcement.
Can we get a brit in here to see what their conception of the law is?
"Selecting policing" is just "discretion", that particular phrase is possibly US-centric but the concept itself isn't.
Or is the US the only place that really does that?
Focus on ‘unusual’. All the words in this document have a meaning.