Is it legal to live on Mars?

Could you please clarify for me, is it legally permissible for individuals to reside on the planet Mars at this time? Are there any international laws or treaties that currently govern the habitation of extraterrestrial bodies, and if so, what do they stipulate regarding the legality of living on Mars? Additionally, have any governments or private entities made any significant strides towards establishing legal frameworks for Martian habitation, and if so, what are the main points of these efforts? I'm particularly interested in understanding the current legal landscape surrounding this question.