[PAR] [TLE] Prime Minister of Australia [SEP] The Prime Minister of the Commonwealth of Australia is the head of government of Australia.  The individual who holds the office is the most senior Minister of the Crown, the leader of the Cabinet and the chairperson of the National Security Committee.  The Prime Minister also has the responsibility of administering the Department of the Prime Minister and Cabinet.  The office is not mentioned in the Constitution of Australia and exists only through longstanding political convention and tradition.  Despite this, in practice it is the most powerful parliamentary position in Australia.  The individual who holds the office is commissioned by the Governor-General of Australia. [PAR] [TLE] Mary Hughes [SEP] Dame Mary Ethel Hughes GBE (née Campbell; 6 June 18742 April 1958) was the second wife of Billy Hughes, Prime Minister of Australia from 1915 to 1923.  She was the daughter of a well-to-do grazier, and grew up in country New South Wales.  She married Hughes in 1911, when she was 37 and he was 48; their only daughter was born in 1915.
[PAR] [TLE] Prime Minister of Australia [ SEP ] The Prime Minister of the Commonwealth of Australia is the head of government of Australia . The individual who holds the office is the most senior Minister of the Crown , the leader of the Cabinet and the chairperson of the National Security Committee . The Prime Minister also has the responsibility of administering the Department of the Prime Minister and Cabinet . The office is not mentioned in the Constitution of Australia and exists only through longstanding political convention and tradition . Despite this , in practice it is the most powerful parliamentary position in Australia . The individual who holds the office is commissioned by the Governor - General of Australia . [PAR] [TLE] Mary Hughes [ SEP ] Dame Mary Ethel Hughes GBE ( née Campbell ; 6 June 18742 April 1958 ) was the second wife of Billy Hughes , Prime Minister of Australia from 1915 to 1923 . She was the daughter of a well - to - do grazier , and grew up in country New South Wales . She married Hughes in 1911 , when she was 37 and he was 48 ; their only daughter was born in 1915 .
During which period Dame Mary Ethel Hughes GBE's husband hold the responsibility of administering the Department of the Prime Minister and Cabinet?
During which period Dame Mary Ethel Hughes GBE 's husband hold the responsibility of administering the Department of the Prime Minister and Cabinet ?
1915 to 1923
1915 to 1923