Beauchamp, Tom L.  “Cosmic Epochs and the Scope of Scientific Laws.”  Process Studies 2, no. 4 (Winter 1972): 296-299.

Abstract

For Whitehead scientific laws are spatially and temporally restricted and only support counterfactuals whose conditions are within the scope of the law.  Kneale and others (e.g., Popper, Pap, Carnap) believe this account mistaken, because they think nomological generalizations are universally quantified statements which are omnitemporally and omnispatially unrestricted in scope.  But Whitehead's scepticism about the epistemic grounding of such claims is more plausible than these philosophers have believed.  Their omnitemporal and omnispatial requirements are gratuitous and unjustified.  [Abstract from The Philosopher’s Index]