Let me try to explain things as simply as possible (because it will be tl;dr otherwise).
Prior to this year's Annual Meeting, only the Board got to choose the IAAF rep.
This was not an L&L year, but because the Board introduced emergency legislation elsewhere in that article, it opened things up for David to be able to change the bylaw for members to vote.
He also submitted a bunch of other counter proposals to the Board's emergency legislative proposals.
During the week, David and Becky Oakes (representing the Board) worked out compromises on everything except this. The Board wanted to be able to overturn the vote of the people with a simple majority, David was willing to let them overturn it with a super majority. The L&L committee voted and approved the supermajority, but the Board still had the ability to fight it at the Closing Session.
We were going to mud wrestle for it in a Closing Session Floor Fight but the Board caved at the last minute and did not fight it and the 2/3 overturning thing passed.
The Board met and voted and overturned the floor vote (in executive session, a totally inappropriate use of executive session IMO)
Sorry that was still long...
The funny thing is, the Board caved in on most of the other proposals they made, in order to focus on fighting this issue. That could have ramifications with the USOC, as they were allegedly the ones pushing for the other changes.