User blog comment:Gundam Legilis/Questions at the Panel/@comment-25396609-20150804024622/@comment-24891101-20150804031015

Well, it's actually the opposite. All we have is acronymic team names, with the extant examples possessing no vowels. Certain people are making the positive claim, without evidence, that vowels are disallowed. Therefore, the appropriate null given a small sample set and the general rules of acronyms is to presume vowels can be used, in the absence of a statement to the contrary.