The underwriting problem
Foreign event risk is a legal geography problem before it is a physical one. The event may be routine; the jurisdiction it sits in is not.
An organizer who has run the same conference for a decade assumes the program travels with it. It usually does not. The domestic form limits territory, or grants worldwide cover only for suits brought in the United States, which is the one place an injured local attendee will never file. Meanwhile the host country may require insurance to be issued by a locally licensed carrier, the venue may demand limits and indemnities in a currency and a legal tradition the US form never contemplated, and the travelling staff have left the workers' compensation system behind at departure. Underwriters price the country, the contract, and the lead time — which is why a placement started ninety days out with the venue agreement in hand looks entirely different from the same risk presented three weeks before move-in.