Table:
text: Minimum Age Convention, 1973
Effect on other conventions
Effect on other conventions
ILO_code Field conclusion_date entry_into_force closure_for_signature Parties_April_2011 Denunciations_September_2011 revising_conventions text_and_ratifications
C5 Industry 28 November 1919 13 June 1921 N.A. 2 70 C59, this convention Text, ratifications
C7 Sea 7 July 1920 27 September 1921 N.A. 3 50 C58, this convention, MLC Text, ratifications
C10 Agriculture 16 November 1921 31 August 1923 N.A. 4 51 this convention Text, ratifications
C15 trimmers and stokers 11 November 1921 20 November 1922 N.A. 9 60 this convention Text, ratifications
C33 Non-Industrial Employment (revised) 30 April 1932 6 June 1935 29 December 1950 2 23 C60, this convention Text, ratifications

Question: What was the revised convention of the field "trimmers and heaters" in the minimum age convention of 1973?