> I've never heard of this legal definition of "professional" that you put forward. Where is this in state or federal law? Professional, as in professional eng

> I've never heard of this legal definition of "professional" that you put forward. Where is this in state or federal law? Professional, as in professional engineer. Think civil engineers, for example, who need to be registered with the board of engineers in order to provide engineering services (eg. approving plans for construction, supervising construction). Other countries also have specific legal statutes that regulate the title of engineer, such as Canada.