37-B M.R.S. §150: Unauthorized voluntary service without pay prohibited

A unit of the state military forces may not perform any voluntary active state service without pay, unless authorized by express order of the Governor.

An officer, warrant officer or enlisted person or any retired officer, retired warrant officer or retired enlisted person of the state military forces may not perform any voluntary active state service without pay, unless authorized by express order of the Governor, the Adjutant General or the Deputy Adjutant General.