\nWhen solid fuel is sold in lots not exceeding 100 pounds, the provisions of section 4164(a) (relating to weighmaster's certificate required) shall not apply if the solid fuel is delivered in closed containers or closed bags and the net contents of the bag or container, expressed in avoirdupois pounds, the type of solid fuel and the name, address, city, state and zip code of the seller are plainly stamped or printed on the containers or bags or upon a tag securely attached to the containers or bags.
Pennsylvania Legal Code