Looks like the window will open on Sept. 1 2017 for the full standard. B Standard will remain 2:19 for men 2:45 for women. Beginning Sept 1 2018 B standard half marathon window opens. Standard will be 1:04 for men and 1:13 for women.
The full B Standards will not be lowered but will be raised if Olympic Stsndard changes. A standard will be announced at later date after bid is awarded to 2020 Trials host. Happy Training to all