Jamieson, Fausset and Brown on Leviticus 4:22-26

22-26. When a ruler hath sinned, and done somewhat through ignorance against any of the commandments--Whatever was the form of government, the king, judge, or subordinate, was the party concerned in this law. The trespass of such a civil functionary being less serious in its character and consequences than that either of the high priest or the congregation, a sin offering of inferior value was required--"a kid of the goats"; and neither was the blood carried into the sanctuary, but applied only to the altar of burnt offering; nor was the carcass taken without the camp; it was eaten by the priests-in-waiting.