Robust behaviour in the construction industry has always been part of the culture in the sector. Aggressive behaviour on either side of the industrial relations environment has been longstanding and historical. However, it is alleged, and there is credible evidence, that menacing behaviour has become entrenched and constant as part of doing business in some parts of the industrial relations environment in the construction industry in 2024. The following memo makes clear the definition of menacing behaviour, the guidelines for CFMEU staff, and directions to all organisers regarding the use of menacing behaviour as an industrial relations practice. All staff are expected to understand the definition of menacing behaviour and the consequences of ignoring this memo and its direction.