evidence: The Serranilla Bank was first shown on Spanish maps in 1510. The United States claimed the Bank under the Guano Islands Act in 1879 and 1880.[5] Colombia (indirectly) and possibly Honduras[6] also claim the Bank. The U.S. ceded claims to several "guano islands" to Colombia in 1981, but Serranilla Bank was not definitely included. [...] Honduras claims Serranilla Bank as part of its national territory in Article 10 of its Constitution.[25] In 1986, it agreed upon a maritime boundary demarcation with Colombia that excluded Honduras of any control over the bank or its surrounding waters.[3][26] The ratification of this boundary on 20 December 1999[27] proved to be controversial within Honduras, as it ensured that the state implicitly recognised Colombia's sovereignty over the claimed territory.[28] Nicaragua, which has not resolved its maritime borders with Honduras or Colombia, disputed Honduras' legal right to hand over these areas before the ICJ.[17][29] Despite the agreement with Colombia, however, the government has yet to officially renounce the claim in the Constitution.