How long does a purchaser have to accept a Foreign Military Sales Letter of Offer and Acceptance?

International partners should strive to accept a case by the offer expiration date (OED). If this is not feasible, the international partner may request an extension from the IA. If an extension is required, the international partner should notify the IA as soon as possible, preferably in the LOR. Many considerations, such as contract deadlines for multi-country programs or policy concerns, may preclude granting an extension. International partners should note that, even if an extension is granted, cost and delivery data are estimates and subject to change over time. An extended time period between the LOA offer and acceptance may result in less accurate cost and delivery estimates. Occasionally, the USG will give the international partner a shorter than authorized OED, generally in conjunction with contractual requirements (e.g., grouping purchases for economy of scale and reduced prices for all concerned). When this occurs, the USG should advise the international partner in advance and must include a special note in the LOA explaining the reason for the short OED.