The Australian Classification Board has classified Garth Ennis and Darick Robertson's The Boys comic book series. They've announced the classification here. Some volumes are Category 1 Restricted, for 18+ readers, other volumes are Unrestricted M, not recommended for readers under 15.
Please note, Category 1 publications cannot be available through libraries in Queensland. In all other states, libraries need to follow the conditions in their state's legistation, including ensuring that these materials are not accessed or loaned to borrowers under 18 years of age. Materials need to also be packaged, marked and stored appropriately (see the ACB's Markings Downloads and Guides here).
Volumes rated Unrestricted M are not recommended for readers under 15 years of age. These materials need to have appropriate labels affixed (see the ACB's Markings Downloads and Guides here) and dealt with according to your library's collection management polices.
To know more about the ratings and what they mean you can check the ACB's information on ratings and they mean here.
If you're interested in following the Australian Classification Board's classification announcements you can subscribe to their RSS feeds here.