List of whips in the Australian House of Representatives
Liberal Party of Australia

Whip
Date
Deputy Whip
Date
Leader
Allan Guy (Wilmot)
21 February 1945
-
-
Robert Menzies
Allan McDonald (Corangamite)
8 November 1946
-
-
Robert Menzies
Jo Gullett (Henty)
16 February 1950
-
-
Robert Menzies
Jo Gullett (Henty)
16 February 1950
Reginald Swartz (Darling Downs)
c. Sept 1950
Robert Menzies
Jo Gullett (Henty)
16 February 1950
Hubert Opperman (Corio)
20 August 1952
Robert Menzies
Hubert Opperman (Corio)
15 December 1955
Henry Pearce (Capricornia)
Unknown
Robert Menzies
Henry Pearce (Capricornia)
5 February 1960
William Aston (Phillip)
10 March 1960
Robert Menzies
Fred Chaney, Sr. (Perth)
23 January 1962
Peter Howson (Fawkner)
23 February 1962
Robert Menzies
Peter Howson (Fawkner)
22 December 1963
William Aston (Phillip)
22 December 1963
Robert Menzies
William Aston (Phillip)
10 June 1964
Bert Kelly (Wakefield)
c. August 1964
Robert Menzies
William Aston (Phillip)
10 June 1964
Bert Kelly (Wakefield)
c. August 1964
Harold Holt
Dudley Erwin (Ballarat)
21 February 1967
James Killen (Moreton)
21 February 1967
Harold Holt
Dudley Erwin (Ballarat)
21 February 1967
Kevin Cairns (Lilley)
23 August 1967
Harold Holt
Dudley Erwin (Ballarat)
21 February 1967
Kevin Cairns (Lilley)
23 August 1967
John Gorton
Max Fox (Henty)
12 February 1969
Kevin Cairns (Lilley)
23 August 1967
John Gorton
Max Fox (Henty)
12 February 1969
Geoffrey Giles (Angas)
24 November 1969
John Gorton
Max Fox (Henty)
12 February 1969
Geoffrey Giles (Angas)
24 November 1969
William McMahon
Max Fox (Henty)
12 February 1969
Geoffrey Giles (Angas)
24 November 1969
Billy Snedden
Victor Garland (Curtin)
14 June 1974
Don Cameron (Griffith)
14 June 1974
Billy Snedden
Victor Garland (Curtin)
14 June 1974
Don Cameron (Griffith)
14 June 1974
Malcolm Fraser
John Bourchier (Bendigo)
26 March 1975
Don Cameron (Griffith)
14 June 1974
Malcolm Fraser
John Bourchier (Bendigo)
26 March 1975
John Hodges (Petrie)
16 March 1978
Malcolm Fraser
John Bourchier (Bendigo)
26 March 1975
Ross McLean (Perth)
May 1982
Malcolm Fraser
Don Dobie (Cook)
16 March 1983
Ewen Cameron (Indi)
16 March 1983
Andrew Peacock
Ewen Cameron (Indi)
9 September 1985
Neil Andrew (Wakefield)
9 September 1985
John Howard
Michael MacKellar (Warringah)
12 May 1989
David Hawker (Wannon)
12 May 1989
Andrew Peacock
Bob Halverson (Casey)
11 April 1990
Neil Andrew (Wakefield)
11 April 1990
John Hewson
Rod Atkinson (Isaacs)
7 April 1993
Paul Filing (Moore)
7 April 1993
John Hewson

Question: When was Dudley Erwin a Government Whip?
Answer: Dudley Erwin was a Government Whip from 1967 to 1969.