Court of Appeal Confirms that Right of First Refusal Expires After One Shot at Using It. Absent any other wording to the contrary, Rights of First Refusals in a Lease can only be triggered once: if not duly exercised, the tenant loses the right to enforce the ROFR during subsequent offers presented to the Landlord/Owner.
Camsal Inc. v. Penner International Inc., 2022 ONCA 20
https://www.canlii.org/en/on/onca/doc/2022/2022onca20/2022onca20.html