Are referendum results binding?

Jamaica
- Mandatory referendum - always
- Optional referendum - always
Constitution of Jamaica
(Adopted 1962, last amended 2011)
http://pdba.georgetown.edu/Constitutions/Jamaica/jam62.html
49.3.d: any of the provisions of the Jamaica Independence Act, 1962, a Bill for an Act of Parliamentunder this section shall not be submitted to the Governor-General for hisassent unless-
i. a period of three months haselapsed between the introduction of the Bill into the House of Representativesand the commencement of the first debate on the whole text of that Bill in thatHouse and a further period of three months has elapsed between the conclusionof that debate and the passing of that Bill by that House, and
ii. subject to the provisions ofsubsection (6) of this section, the Bill, not less than two nor more than sixmonths after its passage through both Houses, has been submitted to theelectors qualified to vote for the election of members of the House ofRepresentatives and, on a vote taken in such manner as Parliament mayprescribe, the majority of the electors voting have approved the Bill.
49.5: If a Bill for an Act of Parliament which alters any of theprovisions specified in subsection (2) of this section is passed by the Houseof Representatives –
a. twice in the same session in the manner prescribed bysubsection (2) and paragraph (a) of subsection (4) of this section and havingbeen sent to the Senate on the first occasion at least seven months before theend of the session and on the second occasion at least one month before the endof the session, is rejected the Senate on each occasion, or
b. in two successive sessions (whether of the same Parliament or not) in themanner prescribed by subsection (2) and paragraph (a) of subsection (4) of thissection and, having been sent to the Senate in each of those sessions at leastone month before the end of the session, the second occasion being at least sixmonths after the first occasion, is rejected by the Senate in each of thosesessions,
that Bill may, not less than two nor more than six months afterits rejection by the Senate for the second time, be submitted to the electorsqualified to vote for the election of members of the House of Representativesand, if on a vote taken in such manner as Parliament may prescribe,three-fifths of the electors voting approve the Bill, the Bill may be presented to the Governor-Generalfor assent.
49.6: If a Bill for an Act of Parliament which alters any of theprovisions specified in subsection (3) of this section is passed by the Houseof Representatives –
a. twice in the same session in the manner prescribed bysubsection (3) and paragraph (a) of subsection (4) of this section and havingbeen sent to the Senate on the first occasion at least seven months before theend of the session and on the second occasion at least one month before the endof the session, is rejected by the Senate on each occasion, or
b. in two successive sessions (whether of the same Parliament ornot) in the manner prescribed by subsection (3) and paragraph (a) of subsection(4) of this section and, having been vent to the Senate in each of thosesessions at least one month before the end of the session, the second occasionbeing at least six months after the first occasion, is rejected by the Senatein each of those sessions,
that Bill may, not less than two nor more than six months afterits rejection by the Senate for the second time, be submitted to the electorsqualified to vote for the election of members of the House of Representativesand, if on a vote taken in such manner as Parliament may prescribe, two-thirdsof the electors voting approve the Bill, the Bill may be presented to the Governor-General forassent.