A few examples
21 USC §461 & 9 CFR §381.125(b)(3)(iii) make it a federal crime to sell uncooked chicken without a picture of a skillet on the label.— A Crime a Day (@CrimeADay) 30 October 2017
21 USC §333, 21 CFR §139.140 & 139.110(c) make it a federal crime to sell wheat and soy spaghetti if it's not tube-shaped or cord-shaped.— A Crime a Day (@CrimeADay) 15 October 2017
21 USC §§610, 676 & 9 CFR §319.307 make it a federal crime to sell "spaghetti sauce with meat" if it's less than 6% meat.— A Crime a Day (@CrimeADay) 12 September 2017