Notwithstanding any other law, a commercial weighing or measuring device is exempt from this subchapter, including the inspection requirements under § 13.101 and the registration requirements under § 13.1011, if the device is exclusively used to weigh food:
(1) sold ready for immediate consumption, regardless of whether the food is consumed on the premises where the food is weighed and sold; and
(2) not exempted from sales and use taxes under § 151.314, Tax Code.