Foreign law is foreign law.

International law is not foreign law. Actually, it’s not really even law in the sense most people think about it. “International law” consists of mutual treaties that two or more countries have signed; the most glaring example is the UN Charter. Theoretically, a country is legally bound by any treaties it has signed, although there’s no international police force and no international court to enforce the treaty if one side abrogates it. It entirely depends on goodwill.

A local law in Oklahoma would not affect “international law” in any way whatsoever.