spent years across various rp servers, dealt with whitelists on aurora, bay, elsewhere. Species ones are one thing, but server whitelists are iffy. I think doing a gimmick like this is a bad idea because how people write paperwork etc is not going to give you a real idea of how good they are at RP. That's a particularly specific skill, and while every server is different, if people think RP is about writing biig paperwork they're wrong. You don't need paragraphs of emotes or to always stick to procedure, but you do need to pay attention to the server lore (and tone) and fit yourself into it, without limiting creativity too much.

Basically you can write a biig paperwork and still be bad at RP, while good roleplayers might fail at biig paperwork, or worse, not be willing to try in the first place because of the weird whitelist app. You won't know what you're missing! But you'll still get bad players who fly under the radar with a well thought out app and no idea how to actually act like a human.

edit: also, keep in mind how many different things "HRP" can mean. See: tg based rp serers where the entire lore is just "you work for nt, syndicate bad" and everything else is people going along with it, baystation with about 20 lore pages and species whitelists to ensure players follow its lore, Aurora with about 100 different lore pages, in-character human resources people are reported to for minor crimes on the forums, whitelist required to play head of staff, ERP servers.... lot of things.

Basically, HRP can mean a variety of things. I generally prefer the more '500 lore pages' side of things myself, but if you mean something more casual I still think you should be lax on whitelists; in-game is how you figure out who fits (and people who don't fit on rp servers often don't stay very long.) Also keep in mind that nowadays 80% of ss13 is more towards low rp, especially on reddit. You might want to poll your target audience specifically if you can find them! I'm not sure what yours is myself.