There are multiple constitutions and iterations of the Venezuelan constitution and the first instance of freedom of association is the 1961 constitution which indicated in article 70 that everyone has the right to associate for lawful purposes, in accordance with the law.

Bolivarian Republic of Venezuela. 1961. “Constitución de Venezuela, 1961 Con Reformas de 1983.” Pdba.georgetown.edu. 1961. https://pdba.georgetown.edu/Constitutions/Venezuela/ven1961.html.