The BIM Competition requires that digital models be converted to IFC open format. This exchange format gives us Open BIM for interoperability.
The IFC format improves collaboration and simplifies the management of data used by the wider project team and by other external partners, like jury members for example.
For ArchiCAD, download this very complete IFC training Guide translated into English : click here.
You also can find the Rob Jackson’s blog here. Rob Jackson is a qualified architect responsible for BIM at Bond Bryan Architects. He uses to work with ArchiCAD.