A more thorough explanation:

DONEC

Donec (doh-nek) is a Latin term that was used in old conveyances. It means "as long as," "while," "until," or "within a certain time."

• "The tenant may use the property donec the lease expires."
• "The seller has the right to possession donec the purchase price is paid in full."

These examples illustrate how donec is used to indicate a specific period of time during which something is allowed or expected to happen. In the first example, the tenant is allowed to use the property for as long as the lease is in effect. In the second example, the seller has the right to possession until the buyer pays the full purchase price.