He played an active part in multi-party talks held in London, culminating in the new constitution and Fiji's independence in 1970.
The multi-party talks will aim at finding a formula for local rule in the British province, two years after a last round ended without accord.
Trimble at first opposed the appointment of former U.S. Senator George J. Mitchell as the chairman of multi-party talks, but eventually accepted him.
In early July, Chief Buthelezi led Inkatha out of the multi-party talks that produced the transition accord.
But earlier this month, the PAC appeared to have abandoned armed struggle when it agreed to attend next month's renewed multi-party constitutional talks.
Other more militant Protestant groups assailed the announcement, saying it was simply a tactical move to get Sinn Fein into the multi-party talks.
Despite the riots caused by Mr Hani's murder, multi-party talks on a new constitution have plodded on.
A resumption of multi-party constitutional talks is now well within reach.
Do you support the agreement reached at the multi-party talks on Northern Ireland and set out in Command Paper 3883?
She represented the Irish Government at the multi-party talks at Stormont, which culminated in the Belfast Agreement in 1998.