principle that the former takes certain defined classes and the latter takes the As all the applicants assisted from either source are ex hypothesi in need, the definition of eligibility to be dealt with by the Board must rest on some criterion more specific than the mere existence of need. 5. The classes now under the Board are (a) Unemployed persons within the scope of Contributory Pensions Insurance (b) Old Age Pensioners (including Widow Pensioners over 60) (c) (as a war measure) persons in distress as a result of the war.