(a) For the purpose of this order, the term seaman shall include every person, irrespective of capacity or rating, whose last service has been on a vessel operated for the account of the National Shipping Authority, upon which vessel he had signed shipping articles and whether or not he had signed off such articles before a consular or other authorized official, but shall not include the master of such a vessel.(b) The term General Agent shall include any designated representative of such General Agent.