International Association of Coaching (IAC)
Competence
Coaches will maintain high standards of competence in their work.
Integrity
Coaches will represent themselves in an honest and fair manner, being cognizant of their particular competencies and limitations.
Coaches strive to be aware of their own belief systems, values, needs, and limitations and the effect of these on their work. To the extent feasible, they attempt to clarify for relevant parties the roles they are performing and to function appropriately in accordance with those roles.
Professional Responsibility
Coaches will uphold standards of ethical conduct that reflect well on the individual coach as well as the profession at large.
Respect for People's Rights and Dignity
Coaches will treat clients with dignity and respect being aware of cultural differences, and the client's right to autonomy, privacy, and confidentiality.
Coaches accord appropriate respect to the fundamental rights, dignity, and worth of all people. They respect the rights of individuals to privacy, confidentiality, self-determination, and autonomy, mindful that legal and other obligations may lead to inconsistency and conflict with the exercise of these rights. Coaches are aware of cultural, individual, and role differences, including those due to age, gender, race, ethnicity, national origin, religion, sexual orientation, disability, language, and socioeconomic status.
Coaches try to eliminate the effect on their work of biases based on those factors, and they do not knowingly participate in or condone unfair discriminatory practices.
http://www.certifiedcoach.org/ethics/principles.html