On March 1, 2006, CERO implemented the latest revision of its ratings system. The symbols that CERO uses are stylized depictions of letters, meant to convey at a glance, a game's suitability for minors:
According to Kazuya Watanabe, CERO's senior director, the group of assessors is composed of three "regular people, unaffiliated with the game industry". They are trained by rating past games. The ratings process is determined by 30 different types of content ranging from sexual content to violence. In addition six types of content are not allowed. Each content is rated using the A to Z scale that the labels use. After the group evaluates the game, the results are sent to CERO's main office where the final rating attempts to use the majority of the evaluators' ratings.
One month after the initial release of Atelier Meruru: The Apprentice of Arland, shipments of it were halted due to it having been mis-rated. It was re-released a few days later with a B rating from CERO. Its A (All Ages) rating was revoked and it was given a B (Ages 12+) rating instead, due to some partial nudity scenes featured in-game. One of these features several characters in a hot spring with their genitalia barely covered (i.e. hidden by towels and heavy steam effects). There are also some cleavage shots and see-through articles of clothing throughout the game. The in-game camera can also be scrolled to view female characters' underwear. The game was originally rating for all ages due to Gust allegedly not providing them with the complete content of the game for them to review.