"The line is under section 4, about 10 lines down. It reads:"
If a resident of Canada is selected as a winner, they will be required to correctly answer, without assistance of any kind, whether mechanical or otherwise, a timed, mathematical skill-testing question, to be administered by Marden- Kane, Inc. either by mail, telephone, e-mail, or fax (at its sole discretion) before the awarding of the prize.(I think Starbucks has to do this because maybe contests of pure chance aren't allowed in Canada? -- Mark) Link to PDF of sweepstakes rules
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects