If there is no agreement in writing then there is a verbal agreement as employees,
If there is no breach you cannot seek a mediation because there is nothing to resolve.
If the agreement is to be changed you would need a 75% majority of the shareholders.
You need to see the solicitor that drafted it as they would have knowledge of what was intended and how the agreement was drafted.
If they cannot shed some light then they would need to look at the Corporation Act.
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