Part 2 Section 13 of the Constitution lists the rights regarding freedom of speech, assembly, association, movement and residence. The Constitution was first drafted in 1954, in a constitutional convention with New Zealand. The Final draft was approved in 1962, The year of independence.

Britannica. Samoa https://www.britannica.com/place/Samoa-island-nation-Pacific-Ocean/History

CONSTITUTION OF THE INDEPENDENT STATE OF SAMOA. International Labour Organization. https://www.ilo.org/dyn/natlex/docs/ELECTRONIC/44021/124322/F-82949215/WSM44021.pdf