I don't think anybody would disagree that male only guizing is an accepted custom of the Lerwick festival. The instruction "it is the duty of each Guizer to conduct himself at all times in accordance with the “Spirit of Up-Helly-Aa” with goodwill and strict adherence to accepted customs." is therefore quite clear. So, are you saying that despite the previous alleged official line', and widespread belief being 'there is no rule banning female participants', a ban on female participants does actually currently exist? If so, has it existed for some time, and the belief it didn't was simply another myth, or has the rule been introduced recently? While a current custom may be for only male guisers, customs are quickly and easily rendered obsolete by many types of circumstance, practicalities, challenges etc. UHA has seen numerous changes and an evolution over time, different procession routes, different burning sites etc. Prior to those changes the formers route, burning site etc could have equally been argued to be 'the custom', but those customs were cast aside for 'reasons', when the right reasons came along, as can any of the current customs be. Any change in gender roles within UHA will have to come from the inside, and having the same old chestnut arguments trotted out every year by those outside UHA, when its been established they won't and can't, and indeed shouldn't change a damn thing, as its not the ousiders party, has gotten very irksome. By all accounts all UHA participants, guisers, hostessess and guests, are either supportive of or at least happy to leave alone the gender defined roles currently in place, and the rest of folk need to accept that its not their business to interfere in it, and live with it. However, should the day come, as it very probably might, either sooner or later, that a significant percentage of participants are no longer content with gender defined roles, I'll put money on it that the 'custom' of male only guisers will go down the Swanee quicker than the the remnants of last nights curry when the chain is pulled.