The clause does not prohibit the federal government from modifying or abrogating contracts. In response, Congress passed a Chinese Exclusion Act in 1879, abrogating the 1868 treaty. Then in 1905 a law was introduced abrogating Napoleon's 1801 Concordat. Finally, the Hungarian government passed an act abrogating Charles's sovereign rights on November 10, 1921. During his 1986 gubernatorial campaign, Thompson suggested abrogating the Ojibwa's rights. Moreover, Nepal was declared a secular state abrogating the previous status of a Hindu Kingdom. Leveson enclosed all the woodland, simply abrogating the commoners' rights. Khaplang announced of abrogating the agreement in March 2015. In its petition, South Dakota cited three factors for abrogating "Quill".