At a lot of Texas high schools, THC vape carts get passed around like they're no bigger deal than a parking ticket. The problem? Under Texas law, that oil is treated more Retailers relieved that Texas skirted a THC ban again The Texas Tribune Texas THC Vape Ban Just Took Effect As of Sept 1, it's now illegal for retailers in Texas to sell or promote THC vapes. Here's what you need to know THC vapes are banned from Texas retailers: 5 things to know