Try here : http://www.aloa.org/legislation/Leg_Map/TX.htm
there is some information.. selling a business to an unlicensed person ? are you just selling the inventory and tools ? or are you selling the business name + any " goodwill" and other intangibles?
If just selling inventory and tools .. I don't understand how that would become your problem, If selling the Business ,well you are getting into a gray area.
Best to contact an attorney .. don't contact the police/ city / government.. they are working in their own interest and will tell you you have to spend money / meet their reqirements.
Everyone who eats potatoes eventually dies. Therefore potatoes are poisonous.