How can CAM providers be "safe" without regulating them?

In countries with a semi-regulated system, some governments (e.g. Denmark, Iceland, Norway, UK) offer a voluntary registration scheme for CAM providers. The purpose of the registration is to safeguard and ensure the rights of consumers who seek "registered" CAM providers. A "registered" CAM provider must have a membership in a government-approved providers’ federation. For a federation to be approved educational qualifications, certain ethical rules, rules for responsible professional conduct, rules for confidentiality as well as procedures for documentation are most often required. Which requirement the authority makes when approving a federation determines the safeguarding of a consumer.