QA-OBS-6: How do I mark my lie when my disc lands in an area of the course that has sensitive, protected, endangered, or valuable foliage?

The Director may declare an area to be OB or a Relief Area, in which case you mark your lie according to the relevant rule. If no special handling of the area has been announced by the Director, and you are prohibited from entering it, then it is a Relief Area, and you play according to the applicable rule. Note that you can take optional relief, or abandon the throw, at the cost of a penalty throw.