Shareholders approved the change at the vehicle's annual general meeting, giving the green light to tweaks that included lifting investment restrictions on single holdings from 5% to 10%.
Under previous rules, £499 million Polar Capital Technology Trust's board felt that no single investment should represent more than 5% of the portfolio at the time of acquisition.
It has now doubled the limit, except were the benchmark weighting exceeds this level, with the change largely due to technology giant Apple which represents more than 13% of the Dow Jones Technology Index.
As a result of strong share performance, analysts at Numis note that Apple accounts for 12.8% of Rogoff's portfolio. 'The stock has risen almost 300% over the past three years,' the broker's investment companies team said, pointing out that changing the vehicle's mandate will give the manager greater flexibility to trade the fund's Apple position.
Earlier this year, Wealth Manager revealed that Rogoff's trust was set to become less benchmark constrained, moving it in a direction similar to Polar Capital's open-end technology fund, also managed by Rogoff.
Over three years to the end of August Rogoff's trust has outperformed the FTSE World Index, delivering 62.31% versus 31%. Its share price has risen 90.19%, and at yesterday's close these traded at a slight 0.5% discount to the trust's net asset value (NAV).