Notwithstanding any other law, a commercial weighing or measuring device is exempt from this subchapter, including the inspection requirements under Section 13.101 and the registration requirements under Section 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 Section 151.314, Tax Code.