The phrase "act of indiscipline" is correct and usable in written English.
It can be used to describe a behavior or action that goes against established rules or norms, particularly in a disciplinary context.
Example: "The student's act of indiscipline resulted in a warning from the school administration."
Alternatives: "breach of discipline" or "violation of rules".
(I know he saved my job at least once, after some act of indiscipline).
That comeback was ended by an act of indiscipline, Dylan Hartley being sent to the sin-bin for kicking out at Duane Vermeulen, and so it was with 10 minutes to go against Australia, the yellow of Farrell and England contrasting with the yellow and green of Australia.
"It was an act of indiscipline and we don't condone that".
A furious Siasia then dropped Enyeama for the 2012 Africa Cup of Nations qualifier, stressing that his act of indiscipline was totally unacceptable.
It could have been a hugely costly act of indiscipline by the Leeds lock, especially as he was also yellow carded, and although Wales did not manage to score while England were down to 14 men, victory looked a long way away for the Six Nations champions.
Though they held him in high regard, Lyautey and Henrys blamed Laverdure for the defeat, with the latter describing the Lieutenant-Colonel's march from Khénifra as a "poorly prepared and poorly executed" "act of indiscipline".
(It has been estimated that some 470,000 conscripts resisted call-up, 310,000 committed acts of indiscipline under arms, and 300,000 deserted).
Mexican club Chivas, removing midfielder Angel Reyna from their squad for "new acts of indiscipline", 12 months after they defended him over an alleged "obscene gesture".
There would be no margin for error for a player who has served six bans for acts of indiscipline during his career and received suspensions totalling 54 weeks, five of the cases coming since 2012 to show that he is not mellowing with age.
"This is consistent with the coach's zero-tolerance approach for acts of indiscipline," the Jamaican FA said.
All the same, this was the biggest act of collective indiscipline of any army on the Western Front in 1914-1918.
