There are no federal laws governing home inspectors. We are regulated only by the individual states. Since the laws vary from state to state – and some states don’t even have home inspection regulations – how can you be sure that your inspector is qualified, experienced, and trustworthy? One way is through home inspector associations.  Some of them require minimum training, education, experience, and adherence to ethical standards – be sure to check out the individual associations to see their individual requirements.

ASHI Code of Ethics
http://www.ashi.org/inspectors/ethics.asp.