I think the rules could maybe use a light revising.
> XHB submissions are anonymous until results are public.
Should maybe also be instructional, something like "do not explicitly reveal your authorship, either in the entry itself or in chat".
> You must follow the bitpack.
For new playas this might be a little confusing? IDK if it warrants a little explanation of what a bitpack is (e.g. "it may have samples you must use", or "it may have instructions on how you must compose your entry", or "it may have something to be used as inspiration for your entry"). It might also be worth reiterating that the entry must also follow the format rules.
> Do not submit boonsave entries.
I think new playas will not know what boonsave means and should probably be explained at least a little bit, something like "don't submit only for the sake of submitting, you must put at least some amount of effort into your entry".
> Arguing with admins about these rules will get you an ailment and/or banned.
IMHO I don't think this is worth putting in the rules. It feels power-trippy and unnecessary, but I also get this was maybe necessary at some phase of the community in the past.
> All tunes will be rendered to MP3 for voting accessibility.
Yeah as Kaytse pointed out, this hasn't applied to XHBs and should maybe be cleared up. Some formats don't even allow MP3s. Sometimes they get rendered and posted in chat but it's not a given.
> Entries that have been previously publicly released are not allowed.
I think this is a generic rule that's included for majors too, but maybe an XHB specific version could be: "your entry must have been made during the XHB period"? With maybe some leeway for instruments, samples, templates, etc.
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At the same time, adding a whole ton of words might also scare potential new battlers off, so would be good to keep it concise as possible. That or keep a short version and have a longer version that can be expanded or popped out for further reading.
After all, best way to learn is by doing :)