Morris, I found Rights & Responsibilities while searching for the origin of the non-man stuff, the latter seemingly having originated with some earnest youngsters; while laughable, I agree that it risks becoming TERF’s winterval.
And who needs it anyway when there’s so much wrong with Rights & Responsibilities.
UpABitLate, I’ve looked and I think you’re correct that there’s sweet FA about women. I found a mention of sexism, but it was disappointing:
Sexual orientation
RR500 Attempts to enforce heterosexuality are as much a violation of human rights as racism and sexism, and must be challenged with equal determination.
Given they seem to have abandoned ‘sex’ in favour of ‘gender’, I’m surprised they bothered mentioning sexism at all (if only to say it’s as bad as enforced heterosexuality or racism) as without the concept of sex, sexism has no meaning.