Title II article 8 covers freedom of association along with, opinion, expression, press, assembly, movement, and manifestation in the Constitution of the Republic of Senegal. Independence was gained from France in 1960, The constitution was adopted in 1963, most recently promulgated in 2001.

CIA World Factbook. Senegal https://www.cia.gov/the-world-factbook/countries/senegal/#government

Constitution of the republic of Senegal. Translated. https://wipolex-res.wipo.int/edocs/lexdocs/laws/en/sn/sn014en.pdf