Generally a prenuptial agreement will have a specific provision indicating that the agreement is valid in all jurisdictions in which the parties live. Even without that provision, unless the agreement specifically stated that it would only be valid if the parties remained in Maryland (or whatever state the parties lived in when the agreement was executed), it would be valid in any state.
Please note that I am answering this question as a service through Avvo but not as your attorney and no attorney-client relationship is established by this posting. An attorney-client relationship can only be established through signing a Fee Agreement and paying the necessary advanced fees.
Get our best tips and attorney advice in our 3-part prenup email series.