What earlier ethics violation was Justin Trudeau found to have committed in 2017?

In December 2017, Ethics Commissioner Mary Dawson found that Prime Minister Justin Trudeau had violated Canada’s conflict of interest law by vacationing with his family on a private island owned by the Aga Khan IV.1

This incident, along with a later finding regarding the SNC-Lavalin affair, marked the first time in Canadian history that a sitting prime minister was found to have broken federal ethics laws. Upholding ethical standards in public office is a fundamental principle of governance, as it ensures that leaders remain accountable to the public interest rather than personal or private associations.12