Trinidad and Tobago experienced emancipation (officially anyway) due to a royal decree entitled "An Act for the Abolition of Slavery throughout the British Colonies; for promoting the Industry of the manumitted Slaves; and for compensating the Persons hitherto entitled to the Services of such Slaves" but more commonly known as The Slavery Abolition Act of 1833. The text of this document can be found here.

Independence was achieved through mutual agreement with the crown, and manifested in in the writing of The Trinidad and Tobago Independence Act of 1962, detailing the separation of the country in to an independent entity within the Commonwealth. A PDF of this document is obtainable from the T&T government here.