Ah HA! So the guys in the car were actually the food police! Everything is explained!
It is prohibited--
(1) to manufacture, introduce, deliver for introduction, or receive in interstate commerce any food that is adulterated, misbranded, or otherwise unsafe;
(2) to adulterate or misbrand any food in interstate commerce;
(3) for a food establishment or foreign food establishment to fail to register under section 202, or to operate without a valid registration;
(4) to refuse to permit access to a food establishment or food production facility for the inspection and copying of a record as required under sections 205(f) and 206(a);
(5) to fail to establish or maintain any record or to make any report as required under sections 205(f) and 206(b);
(6) to refuse to permit entry to or inspection of a food establishment as required under section 205;
(7) to fail to provide to the Administrator the results of testing or sampling of food, equipment, or material in contact with food, that is positive for any contaminant under section 205(f)(1)(B);
(8) to fail to comply with a provision, regulation, or order of the Administrator under section 202, 203, 204, 206, or 208;
(9) to slaughter an animal that is capable for use in whole or in part as human food at a food establishment processing any food for commerce, except in compliance with the food safety law;
(10) to transfer food in violation of an administrative detention order under section 402 or to remove or alter a required mark or label identifying the food as detained;
(11) to fail to comply with a recall or other order under section 403; or
(12) to otherwise violate the food safety law.