reuse EAP-TLS client certificiate

Greetings, I've done a quick google and scan of the FR user mailing list archives and did not find a definitive answer to the following: With EAP-TLS, can one reuse the same client cert across multiple devices? I'm guessing "yes", but would appreciate confirmation. Tangentially, is there a way to "pin" a certificate to a client's MAC address? Thanks! -m