Continuing education is necessary to maintain a high level of knowledge and skills in cancer registry practice. During the two-year period prior to recertification, CTRs must participate in at least 20 hours of continuing education (CE). A CTR must complete 20 hours of continuing education credits every two years to maintain a certified status. The required 20 CEs helps keep CTRs current on new developments in the field of oncology and registry data management. The two-year CE cycle ends on December 31. Additional CE credits earned cannot be carried over to the next CE cycle. The deadline to submit required CE hours and pay the annual CTR maintenance fee is January 31. CTRs are out of compliance when requirements are not met by the January 31 deadline.