To those who have personally or know about doing empirical psychedelic studies, what is specifically allowed, what is specifically banned, and what is the gray area? Is it all relative dependent on the study, or because it all involves technically illegal substances and human subjects is there no gray area? If there is no gray area how, then, is the scientific community making such monumental progress on the subject? How about repercussions of having done the study already? In essence, what is crucial to know before conducting an experiment of such nature? Also, how would you look for participants/be a participant yourself?