Transit VISA for My Son.

I am working in Fiji Island since 2nd December 2013. I have valid work permit for two years and attached to the Fiji National University as a Visiting Fellow. All my family granted permission to stay there for two years. My son need to come to me on 6th of January 2014. His air ticket and other required documents with him. Still he is in 14 years old. He is coming with other Sri Lankan family to here. Please let me know the requirements for transit G. He is using Cathe Pacific air line.