RYR operate on an Irish IAA AOC, and as Ireland is a full JAA member, they operate to exactly the same rules as you in Germany ( in theory at least!)
JAR Ops subpart Q ( Flight duty times & limitations) has not yet been officially agreed upon or implemented, and therefore each state still works to it's own rules, with the UK CAA's CAP371 being used as a guideline.
In Ireland each operator must submit their own flight duty times/ limitations scheme as part of their Op's manual part A to the IAA for approval, therefore you will find differences between RYR and other airlines operating on an Irish AOC.
Realistically the only way you will get the information you require is if some kind RYR soul will copy you the relevant section of his/ her Op's part A.
Sorry I can't help more....