It is one of the last publishers to retain the CCA seal of approval, which will be replaced with its own ratings, reports Newsarama.
DC will now rate its own comics as E (everyone), T (teen), T+ (teen plus) and M (mature), as it already does for its digital releases.
The controversial code was established in 1954, partly in response to Fredric Wertham's infamous book Seduction of the Innocent. It set stringent rules on the portrayal of crime, violence and sexuality in comics.
Archie Comics and Bongo Comics are the only remaining publishers to submit their work to the CCA. Marvel Comics implemented their own rating system in 2001 after X-Factor #116 was denied approval.