無任所大臣
The Ministers and Secretaries (Amendment) Act 1939 allows a Minister to be a member of the Government of Ireland who does not have charge of a Department of State, such a person to be known as a "Minister without portfolio". Such a minister may be given a specific style or title. The only substantive minister without portfolio has been Frank Aiken, the Minister for the Co-ordination of Defensive Measures during World War II. By the Emergency Powers Act 1939 then in force, the Minister for Defence was able to delegate some competences to him.