The law on biomedical research on human subjects which will keep a tab on unethical medical practices and help those who abide by medical science ethics will be in place of end of 2012 an official of the union health ministry said Tuesday. Everybody should do trials by following ethical practices. If a therapy is approved the doctor is authorised to use it and practice. But if you do anything beyond that whether it is drugs or cells then it is an experimental practice which is unethical said Health Research Secretary Vishwa Mohan Katoch on the sidelines of a workshop