Groundspeak do reserve the right to publish caches which do not meet the Guidelines
At times a cache may meet the listing requirements for the site but the reviewers, as experienced cachers, may see additional concerns that you as a cache placer may not have noticed. As a courtesy, the reviewer may bring additional concerns about cache placement to your attention and offer suggestions before posting. But as the cache owner you are responsible for placement and care of your cache.
Note: Exceptions to the listing guidelines may occasionally be made depending on the novel nature and merits of a cache. If you have a cache idea you believe is novel, contact Groundspeak before placing and reporting it on the Geocaching.com web site.
And do allow caches in locations where there is a Entrance Fee, usually locations which are a "Not for Profit" basis. The cache in Question is located on a site owned by The University of Oxford, there is no information to indicate that the site is run by a "For Profit" company owned by the University. So I am guessing it has been treated exactly the same as other "Not for Profit" locations where there is a cache.
This "Not for Profit" allowance would cover and does a organisation such as the National Trust as well, where a entrance fee is charged per person and not just for parking [meaning that you have to pay to access the site, even if you are on foot].
Deci
My post is my personal opinion and as such you do not have my permission to quote me outside of these forums!
Dave
Brenin Tegeingl
Formerly known as Mancunian Pyrocacher on GC