I know I'm a little late on this...
Like another Texan here, I'm glad of where I live, the laws allow anything single-edged and no more than 5.5 inches blade length. That said, I've been told (by folks not knowing any better) that my Cold Steel Mini Culloden (a modern Skean Dhub) is illegal as it is a dirk. I tried arguing that at best it is "dirk-shaped" but is too small to be a true dirk, but got nowhere with that fool. (Funny bit is that Cold Steel actually sells a Dirk, over a foot long!) (Texas case law established an exception for "Bowie-shaped" knives if they meet the other allowances, while a real Bowie knife is illegal, as it is much longer than 5.5"!) I do find it amusing that British law allowed knives "as part of a national costume" while forbiding them for nearly everyone else. (At least, that was how I understood the law there a few years back, I don't know if that gone with the latest crackdowns.)

Matt in Texas