Can’t tell if you’re joking, but a Request For Comments is effectively a proposal for how a process should be performed.
Some of them are eventually ratified as internet standards by the IETF.
Plenty of them remain useful as defacto standards even without formal acknowledgement.
This requirement is designed to be hard, and as such is a major red flag to me.
What else is this company going to be difficult with?
Can i only get customer support or cancel my account in person, between 9-4 on the 2nd Friday of the month?
I would consider alternatives, if possible.