The Belmont Report- governs the ethics of medical research in USA

Where can you find the federal standards that govern the ethics of psychiatric med research ? (especially wrt children, adolescents, the elderly, minorities and other vulnerable populations)
The Belmont Report http://ohsr.od.nih.gov/guidelines/belmont.html - this report was written as part of the response to the moral outrage over the Tuskeegee syphilis experiments, when that was discovered in the 1970s.