Other areas of ethical consumerism, such as fair trade labelling, have comprehensive codes and regulations which must be adhered to in order to be certified. Ethical banking has not developed to this point; because of this it is difficult to create a concrete definition that distinguishes ethical banks from conventional banks. Ethical banks are regulated by the same authorities as traditional banks and have to abide by the same rules. While there are differences between ethical banks, they do share a desire to uphold principles in the projects they finance, the most frequent including: transparency and social and/or environmental values. Ethical banks sometimes work with narrower profit margins than traditional ones, and therefore they may have few offices and operate mostly by phone, Internet, or mail. Ethical banking is considered one of several forms of alternative banking.