As with all projects there has to be a few rules:
Pairings cannot be incestuous in nature. Any pairings where the character shares blood is not allowed (Eirika x Ephraim, Corrin x Azura, Ike x Mist, Byleth x Rhea), where characters were raised in a sibling, parent etc type relationship is also not allowed (Micaiah x Sothe, Corrin x the Nohrian Royals) and last but not least pairings featuring couplings where they were raised to believe they are blood siblings/children etc but at the last moment they were revealed to be not related are not allowed, (corrin x the hoshidan royals, Almheda x Zelgius), the only exception to this rule is pairings in which their parents were married but they were not raised together.
Pairings cannot feature an adult and minor. (If the game features a timeskip and both characters are adults post timeskip the pairing is allowed so long as it is depicted as such).
The constituent definitions for a crack ship: a pairing that does not share a support conversation in their respective games (Sylvain x edelgard, Frederick x Emmeryn, Tethys x Ephraim), a pairing featuring a fe character and a non fe character (Lucina x Spiderman, Clive x Kermit), has a support conversation in warriors that does not occur in their respective games (Chrom x Camilla).
The constituent definition for a rare pair: a pairing that shares supports in their respective game with less than 150 works on ao3 or ffnet (less than 50 for games prior to fates).
No harrassment towards contributors based upon their; race, age, religion, ships, sexuality, nationality, gender etc; will be tolerated, anyone who fails to abide this rule will be reported and banned.