There are many instances in which claims have been deemed ineligible for referral to the IRB, notably those by migrants who seek entry into Canada through the United States, where the Safe Third Country Agreement (STCA) is applied. The STCA dictates persons seeking asylum must make their claim in the first country in which they arrive—either the US or Canada—unless they qualify for an exception. Therefore, if an asylum seeker were to enter the US (as a non-U.S. citizen), make their way to the Canada–U.S. land border, and then attempt to enter Canada with a claim for asylum, they would be denied entry under the STCA. The Agreement is responsible for limiting refugee eligibility to enter Canada and the rejection of several hundred claims a year since its implementation. The CBSA reported that 6,000–14,000 claims were made before the implementation of the STCA, and dropped to an average of 4,000 claims per year after its implementation.