"Canned Maine Sardines in Oil" is the commercially canned product prepared from immature Atlantic herring (Clupea harengus); smoked or not smoked; packed with edible vegetable oil (including olive), with or without added spices, flavorings and/or other ingredients in hermetically sealed containers and so processed by heat so as to attain commercial sterility.
"Immature herring" means herring of which less than fifty percent (50%) have well developed gonads and may or may not have spawned.
01-001 C.M.R. ch. 337, § I-1