Applications are considered in the order in which they are received up to the capacity of each respective testing laboratory.
Early application is recommended, as seats are limited .
An individual check, money order or credit card payment must accompany each application. Due to the time required for testing, examinations are limited to one specialty per day of testing. Prerequisites for CDT candidates are printed on the application form. Participants in the NBC's Recognized Graduate program may apply for the scheduled examinations upon reaching their eligibility. Persons currently certified by the Board may be examined for certification in additional specialties without meeting additional eligibility requirements.