However, some of their roles, notably education and discipline, overlap. This sometimes leads to friction. It is important to note that the American Institute of Architects (AIA) Code of Ethics and Professional Conduct is prescriptive and consists of 6 canons. The first five canons exist in order of scale, starting with the most general and moving through those that affect the greatest number of people, the public, to the smallest number of colleagues and collaborators. The sixth canon, a newcomer, addresses the environment, which covers the largest scale of all, that of the entire planet. The AIA Code encompasses all four approaches to ethics. Its canons invoke virtue ethics to encourage architects to “maintain and advance their knowledge…”. The ethics of contracts appear in statements such as “members should embrace the spirit and letter of the law…”. members should exercise informed and uncompromising professional judgment…” Finally, we hear a utilitarian focus on consequences when we read that members should “reflectively consider the social and environmental impact of their professional activities ».