Are bitcoin cross-border payments legal?

In the realm of cryptocurrency and finance, the legality of bitcoin cross-border payments often raises questions. Could you elaborate on the current legal status of bitcoin when it's used for international transactions? Do different jurisdictions have varying regulations? Are there any specific countries or regions that have outlawed or severely restricted bitcoin cross-border payments? Understanding the legal framework surrounding this topic is crucial for businesses and individuals alike who are considering using bitcoin for international transfers.