Which phrase is commonly used in the granting document of a Fee Simple Determinable estate?

The phrase "So long as" is commonly used in the granting document of a Fee Simple Determinable estate because it clearly establishes a condition that, as long as it is met, the property remains in the ownership of the grantee. This type of estate automatically terminates when a specified condition occurs, reverting the title back to the grantor. The wording "So long as" effectively communicates the intended duration of the estate's validity, tied directly to the fulfillment of that condition.

In contrast, while "Provided that" and "On the condition that" can also establish certain conditions, they are generally more associated with different types of qualifying estates or conditions but aren't as standard for Fee Simple Determinable as "So long as." "Unless otherwise stated" is too vague and does not directly imply the continuous nature of the condition tied to a Fee Simple Determinable estate. The clarity and direct nature of "So long as" make it the most appropriate choice for this specific estate type.