Where is BitMart legal?

I'm curious about the legal status of BitMart in different regions. Could you please provide me with a clear understanding of where BitMart is legally recognized and operational? I'm particularly interested in knowing which countries or jurisdictions have granted BitMart a legal framework to operate within, and if there are any restrictions or limitations in place for its services. Additionally, I would appreciate it if you could also mention any potential legal challenges or regulatory hurdles that BitMart might be facing in certain regions.