People here have a strong 'work ethic'. [=a strong belief in the importance and value of work]
The company has its own 'code of ethics'. [=its own set of rules about good and bad behavior]
His 'ethics' are questionable. [=some of the things he does may be morally wrong]
(..) I saw him and I know he saw me. I went after him and then he disappeared. ' I don't see this as a university issue. ' Of course this is a university issue. There's a code of ethics and an honor code and he violated them both. You enter into a code of ethics with the university, not with each other. (..)2010 The Social Network