Last week I put online China’s official rules for Hanyu Pinyin, the 2012 revision (GB/T 16159-2012). I’ve now made a traditional-Chinese-character version of those rules for Pinyin.
Eventually I’ll also issue versions in Pinyin and English.
(Note: The image above is of course Photoshopped. I altered the cover of the PRC standard simply to provide an illustration in traditional Chinese characters for this post.)