If an invoice goes unpaid

Notice, a fixed minimum period, then a restriction that stops the roster relationship without touching anyone's account.

Either side can give the other formal notice citing a specific unpaid invoice and stating, in their own words, why. That notice does not restrict anything by itself — it starts a fixed notice period (a legal minimum that cannot be shortened), and the arrangement is only actually restricted if the invoice is still unpaid once that period runs out. Paying the invoice at any point before then cancels the notice automatically.

What a restriction actually stops

A restricted arrangement stops being an active roster relationship — no further commission accrues, no further fulfilment work is assigned — but it restricts nothing else. Both sides keep their own account, their own listings, their own calendar and their own buyers throughout, and can keep selling on their own exactly as before. Paying the outstanding invoice lifts the restriction.