Under requirements, mechanically ventilated spaces section,

delete: ", (and for mixed-mode systems when the mechanical ventilation is activated), meet the requirements for both ventilation (option 1 or option 2) and monitoring" .
delete header text: "Mechanical Ventilation Option 1. ASHRAE Standard 62.1–2016" 
delete "OR" above Option 2
delete Option 2 " Option 2.  ISO 17772-1:2017 and EN 16798-3: 2017 and  Projects outside the U.S. may instead meet the requirements of ISO Standard 17772-1:2017, Section 6.3, using Method 1—Perceived air quality with Category I or II and local standard for ventilation system design such as EN Standard 16798-3: 2017, Sections 7-10.
delete header "Monitoring for mechanical ventilation systems" and replace with "AND"

Under naturally ventilated spaces

replace "(and for mixed-mode systems when the mechanical ventilation is inactivated), confirm that natural ventilation is an effective strategy for the project by following the flow diagram in the Chartered Institution of Building Services Engineers (CIBSE) Applications Manual AM10, March 2005, Natural Ventilation in Nondomestic Buildings, Figure 2.8 and meet the requirements for both ventilation (option 1, option 2, or option 3) and monitoring." with "meet one of the following ventilation requirements."
delete header "Natural ventilation"
rename Option 1 header to "Option 1. ASHRAE prescriptive natural ventilation compliance path"
Under Option 1 add "with addendum I" after ASHRAE 62.1-2016, replace "6.4" with "6.4.1, 6.4.3,6.4.4"
rename Option 2 header to "ASHRAE Engineered natural ventilation system compliance path
Under Option 2 add "with addendum I" after ASHRAE 62.1-2016, and after Sections 4 add ", 6.4.2, 6.4.4.5, 6.4.3, 6.4.4 "
delete "and have an engineered natural ventilation system approved by the authority having jurisdiction (per exception 1 of ASHRAE 62.1-2016 section 6.4)"
rename Option 3 header to "Historic building using ASHRAE prescriptive natural ventilation path"
Under Option 3 add "with addendum I" after ASHRAE 62.1-2016, replace "6.4.1" with ".1-6.4.1.6", delete 6.4.2, and add "6.4.4" after 6.4.3
replace "Monitoring for natural ventilation systems" with AND
add "monitoring" so the sentence reads "Comply with at least one of the following monitoring strategies"