It would be June 13, 2016 - tha's what I heard.
Some hints from FLM that S with SSL5/4 in 2015 (based on Y2014 review) will be chopped out with ISP.
This portion of the distribution were not chopped by SSL4/5 in 2016 (based on Y2015 review).
For example, S and SSL5/4 last yr and S and SSL3 this year were saved by last round of ISP.
In contrast, S and SSL3 last year but S and SSL4 were chopped by round# 1 ISP.