As you know from reading certain parts of my blog. I myself am a consultant member of the Australian group: Learning Difficulties Australia. I regularly keep up to date with workshops and seminars on interesting topics revolving around the education of students and such.
All members of LDA including myself must act with a code of ethics which you can view here:
A code of ethics is superior to none in my opinion because clients feel more secure with me as i am compelled to follow a strict standard of guidelines and behavioral codes regarding the treatment of students. In short, is creates confidence within the practice.