See the section below on 'combinations'. Dietitians, for example, are registered in most states. The registering organization, the American Dietetic Association, is a private group. The government is not involved. Information in this chapter regarding certification applies to registration as well.
Certification presumes that an activity is permitted by right.
It presumes a right to work. In chapter 9, it will be explained that this is a negative right to work. This means that one is not automatically provided with a job. Rather it means that one cannot be denied the opportunity to seek work. Licensing increases the power of the government.