What is the annual economic substance declaration in Bermuda?

A yearly form sent to the Registrar of Companies saying whether the company carries on a relevant activity and which one. Every company files it, including those with no relevant activity. Companies that do carry on one, such as holding, financing or headquarters business, must also show adequate management, staff, spending and premises in Bermuda.

Source: Changes to annual declarations for all entities, Government of Bermuda, Registrar of Companies