In addition to analyzing topics that are entirely new to me, part of what I do is fill small gaps in MSCD‘s coverage. So in that spirit, here’s a neat little gap-filler, fed to me by a law student.
The case is IPE Asset Management, LLC v. Fairview Block & Supply Corp., 123 A.D.3d 883, 999 N.Y.S.2d 465 (2014) (PDF here), a New York appellate opinion. The plaintiff, as purchaser, and one of the defendants, Fairview, as seller, entered into a contract for sale of an undeveloped parcel of real property. Here’s how the court describes the dispute:
Section 8 (a) of a rider to the contract provided that, if Fairview failed to obtain rezoning and subdivision approvals for the property for a certain number of “units” within 15 months of closing, the plaintiff, upon the expiration of the 15-month period, with 10 business days’ written notice to Fairview, “may” sell the property back to Fairview for the $600,000 contract price. … A closing took place on June 30, 2005, and it is undisputed that no zoning or subdivision approvals were obtained thereafter. In November 2010, and again in December 2010, the plaintiff notified Fairview that it wished to sell the property back to Fairview for the contract price. Fairview’s attorney responded that the plaintiff’s time to exercise that right had expired.
The plaintiff argued that the contract gave it an open-ended option, and the lower court agreed. But the defendants argued on appeal that the plaintiffs could exercise the option only during “a reasonable time” after the 15-month period had expired. The appeals court held that the language was ambiguous and that the lower court had erred in granting the plaintiff summary judgment.
It might be that this dispute involves not ambiguity but instead undue generality. This sense of upon means “on the occasion of” or “when (something) occurs,” and if the action ostensibly prompted by the event occurs too long after the event, that sense of simultaneity is lost. So the question really is, how long after the event can an action still be described as taking place upon that event?
But however you analyze it, there’s potential for dispute. So here’s my two-part recommendation:
First, if something is triggered by the event, upon is fine: This agreement will terminate upon Acme’s sale of the Shares. But upon is usually followed by an abstract noun, as in the previous example. (It could be followed by a gerund, as in upon Acme’s selling the Shares, but you see that less often.) In any kind of writing, it’s better to use verbs instead of abstract nouns (see MSCD 17.7, or @mrsalzwedel‘s account here), so I’d say instead when Acme sells the Shares.
Second, and more pertinently, if the idea is that a party may take an action or is under an obligation to take an action upon something happening, then state a period for taking that action. And to do that, you would use something other than upon: If during the 30 days after that 15-month period the Buyer notifies the Seller that it wishes to sell the Property back to the Seller …
By the way, why upon rather than on? I agree with Garner’s Modern American Usage that upon is appropriate to express the meaning “on the occasion of” or “when (something) occurs,” but that otherwise you’re better off with on. The result is that you use two different words to convey two different meanings, and that’s a good thing.