We introduced a "mandatory" flag into our VRP database a while ago, and are gradually populating this data into our charts where it is available in source AIPs. Mandatory VRPs are shown filled in with blue; a reversal of their usual colours.

Shifu, the duplication of VRPs in Czech Republic is/was obviously a publishing bug, now corrected. Please feel free to report these things to us directly, or in a thread for the purpose.

Good to see, that the VRP are now in blue, and much better to found, but I don't understood why you changed it only on the Austrian map? Hopefully it will be changed also in other countries!!