Two companies recently merged.

 When a team member consistently ignores a rule, it’s important for the project manager to address this directly with the individual12. Setting up a meeting to review the team charter allows the project manager to clarify expectations, discuss the importance of the rule, and understand the team member’s perspective12. This approach promotes open communication, helps to identify any misunderstandings or disagreements, and can lead to a resolution that supports the team’s effectiveness12. References: 

https://pm.stackexchange.com/questions/1772/a-person-in-a-project-team-not-willing-to-follow-the-rules-what-to-do

https://www.capterra.com/resources/project-managers-can-deal-with-difficult-team-members/