Under Behind the Intent, Beta update, replace the first paragraph with:
The ASHRAE standards have been updated to newer versions:
 ASHRAE 62.1-2010-> ASHRAE 62.1-2016 (updated version)
 ASHRAE 170-2008 and FGI 2010 -> ASHRAE 170-2017 (updated version)
Option 2 is available for use through regional compliance pathways.
 EN 13779-2007 ->EN 16798-3:2017 (local applicability)

and revise the third paragraph with:
Credit language for natural ventilation pathway is revised to incorporate ASHRAE 62.1-2016 addendum l and to reflect better which specific sections from 62.1-2016 need to be met for naturally ventilated spaces, for engineered natural ventilation or for ventilation of projects registered as historic buildings (since existing historic buildings may be limited in their ability to alter the building envelope to include additional ventilation systems/adjust openings).

Under Step-by-Step Guidance
replace step 1 with "Step 1. Evaluate Outdoor Air Quality: For evaluation of outdoor air quality, follow the specific sections 4.5, 6.2, 6.5 and 7 per the latest version of ASHRAE 62.1-2016. ", delete step 3, and add the following after step 1: Steps 2-4. Refer to LEED v4 reference guide.

Under "mechanically ventilated spaces (and Mixed-Mode spaces when a mechanical ventilation is active)" add the following above step 4:

Steps 1. Refer to LEED v4 reference guide
Step 2-3. Refer to the LEED v4 reference guide. Note: The indoor air quality procedure (defined in ASHRAE Standard 62.1–2016, Section 6.3) may not be used to comply with this prerequisite. For projects interested in using this section must pursue the pilot credit Performance-based indoor air quality design and assessment."

Under "Naturally ventilated spaces (and mixed mode systems when mechanical ventilation is inactivated)" and "Steps 1-2. Refer to LEED v4 reference guide" above step 3 and "Step 4. Refer to LEED v4 reference guide" above step 5.

Under Further explanation, required documentation, replace the bullets with:
 For Option 1, Option 2 and mixed mode, confirm that project meets minimum requirements of applicable sections of ASHRAE 62.1- 2016.
 For naturally ventilated and mixed mode ventilated projects, confirmation that projects meets requirements of the applicable sections in ASHRAE 62.1-2016.

For IDC only:
delete section:

"Healthcare:
Confirmation that project meets minimum requirements of ASHRAE 170-2017, Sections 6-10"