A key fund-raiser for federal Treasurer Joe Hockey's electorate conference has been called to give evidence at the Independent Commission Against Corruption inquiry into alleged illegal political donations.

John Hart is chairman of the North Sydney Forum, a controversial fund-raising body attached to the Liberal Party federal electoral conference in Mr Hockey's seat of North Sydney.

Fund-raiser: John Hart.

Mr Hart is also chief executive of Restaurant and Catering Australia, the national lobby group for the hospitality industry.

In May, the ICAC heard that a lavish New Year's Eve 2010 fund-raiser for former NSW police minister Mike Gallacher – who is being investigated by the commission – was held at Doyle's at Circular Quay.