FIDE is publishing the player's contract for the World Cup to be held in Tromso, Norway from 10 August (arrivals / opening ceremony) to 4 September 2013 (departures). The qualified players are expected to fax or email scanned the original document of their signed contract to the FIDE Secretariat's fax number +30 2109212859 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it no later than Tuesday 11 June 2013.

The full technical regulations of the event are on the FIDE handbook:
http://www.fide.com/fide/handbook.html?id=135&view=article

More travel information for Tromso is provided by the local Organising Committee:
http://www.tromso2014.no/world-cup-2013/information-for-players/

FIDE is also publishing the initial list of qualifiers as per regulations:

World Cup qualifiers (pdf)

Player's Contract (pdf)