The Brief New THC regulations across Texas are set to go into effect on Friday after months and years of court battles over the ruling. New THC rules are set to go into effect Friday in Texas after months of court battles over the new rules. What we know:The so-called "Total THC" rules were supposed to take effect March 31, but have been paused several times since then through court injunctions. Delta-8, Delta-10, and several related THC products are affected by the ban. Wood says licensed sellers already comply with strict testing and labeling requirements, and the new rules could push customers to buy unregulated THC products.