But an "intervening event" COULD NOT be something to extend the agreement. The Rams have the unilateral right to extend the agreement year by year as it is up to 2025. So that makes no sense.
Worried we are crossing into hypothetical land here...and to be clear we are talking a highly improbable event, but yes it could be something to extend the agreement. The rams have the unilateral right to extend the agreement year by year through 2025...this is no different than say an aparment renter having the same right...you let the owner know by a specific point each year if you are going to re-up your lease...the owner can't make you stay if you do not choose to re-up.
but a modification to the contract would be an intervening event that could change that (once again this would not happen without both sides agreeing) an example (realize I think none will occur - just pure hypo):
the rams could agree to re-up for a full 5 year period at a different rental rate, not likely to occur but the contract modification would be an "intervening event" that changes rules of the lease. Once again no one can force it on the rams (or the CVC either).
Heck if the rams wanted to (and they don't) they could modify the agreement to use the facility for the next 30 years....giving up their right to go year to year. A party can generally give up a right in a contract modification.
Probably getting to much into contract law and hypotheticals than anything pertinant here. The only possible way I see this clause being activated is if somehow the STL proposal progresses to the point and the Rams are certain they are staying thus both sides would agree to a term matching the construction time of the new stadium. I.e. the rams knowing they are staying sign an agreement to lease the dome for 3-4 yrs while the new staidum is being built. This would probalby be similar to any agreement/contract reached with say the Rose bowl/Colisium if they know they are moving.
Does that happen this year, not sure, it will at some point...at some point both sides will have to show their cards. Ground will need to broken and construction started either place - there will be end....eventually.