Texas Health and Safety Code - HEALTH & SAFETY § 437B.004. Rules

(A) operate outside a specific perimeter of a commercial establishment or restaurant;

(B) enter into any agreement with a commercial establishment or restaurant, except as necessary to properly dispose of grease and other cooking waste;

(C) have an operational handwashing sink in the vehicle of a vendor who sells only prepackaged food;

(D) associate with a commissary if the vehicle carries the equipment necessary to comply with state law and properly disposes of grease and other cooking waste;

(E) provide the vendor's fingerprints as a condition of holding a mobile food vendor license;

(F) install a global positioning system tracking device on the vehicle;

(G) keep the vehicle in constant motion except when serving customers;

(H) submit to an additional fire inspection a vehicle the vendor demonstrates has passed a state or local fire inspection within the preceding 12 months;  or

(I) submit to health inspections other than an inspection the department, or a local authority under a collaborative agreement, conducts unless the department is investigating a reported foodborne illness.