As an active member of the association of Illustrators, I am guided in my practise by the code of conduct for illustrators that they produce on behalf of its members.  The association works hard to raise standards, and promote the profile of Illustrators within the Industry. Professional practise is paramount for the  professional Illustrator, both as an individual practitioner and for the industry as a whole. Without an organisation that actively promotes the professional stature of Illustrators, there would be very  little  recourse when dealing with  commissioners. There would be low standards and an undermining of the professionalism of illustration. Without regulation, In short the industry, would collapse into itself, and be resigned to history as a worthless occupation.  Below is a copy of  the Code of conduct supplied to members of the association of illustrators: