Board Thread:The Panopticon/@comment-45314928-20200727170605/@comment-6032121-20200727213557

This post restates the basic rule-of-thumb, which is acknowledged as a "rule" by (now-former, departed) administrator User:Amorkuz in his reply. The thread was then closed by User:Shambala108 without any additional statement, confirming that as far as the admins were concerned, that was indeed the rule.

I also recommend you read through Thread:209869 — don't let the title fool you, this thread spends a significant of time establishing that yes, a FP story can and did in fact involve a character who, by logical implication relative to what is shown in a story licensed to use the Doctor, can only have been the Doctor. Ditto for the Doctor's TARDIS. The stories didn't themselves mention anything which constituted copyright-infringement, but contained elements which, when cross-referenced with the novel, allowed us to acknowledge that "the cuckoo pilot" is the Doctor. And, again with then-admin Amorkuz's blessing, we did.