All IAAF Member Federations should have received an official letter of invitation from UK Athletics which outlines the official entry process and timeframes.
Submission of Entries and Deadlines
Member Federations must submit their Preliminary Entries on line using the IAAF On-line Event Entry System (http://evententry.iaaf.org) by 26 January 2016 midnight, Monaco time. Preliminary Entries may be submitted starting 4 January 2016.
The Final Entries must also be submitted online using the IAAF on-line Event Entry System (EES), by 14 March 2016 midnight, Monaco time. Final Entries may be submitted starting 22 February 2016.
Final Confirmation of Entries must be made upon the team’s arrival, at the Accreditation Centre.