Full Idea
If there are laws that are instantiated in no particulars, then this would seem to favour the theory that laws connect universals rather than particulars.
Gist of Idea
If laws can be uninstantiated, this favours the view of them as connecting universals
Source
Stephen Mumford (Laws in Nature [2004], 06.4)
Book Reference
Mumford,Stephen: 'Laws in Nature' [Routledge 2006], p.90
A Reaction
There is a dispute here between the Platonic view of uninstantiated universals (Tooley) and the Aristotelian instantiated view (Armstrong). Mumford and I prefer the dispositional account.