(a) Standard loaves of bread, produced in any bakery and procured or kept for the purpose of sale, offered or exposed for sale or sold, shall be of the following standard avoirdupois weight: One pound or additional fraction of one pound up to a maximum of four pounds. The provisions of this section shall not apply to biscuits, buns, crackers, rolls or loaves weighing less than one-quarter pound per unit, or to what is commonly known as “stale” bread, and sold as such, provided the seller at the time of sale shall expressly state to the buyer that the bread so sold is stale bread.

(b) Any person who, by himself or his agent or servant, violates any provision of this section or of any regulation adopted under § 21a-156 with respect thereto shall, upon the first conviction, be fined not more than two hundred dollars and, upon a subsequent conviction, be fined not more than five hundred dollars or imprisoned not more than six months, or both.