The 62.1 User's Manual from the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), does justice to IAQ considerations during construction and how it is affected by startup procedures. It's important for HVAC contractors to be aware of this information. If only for the sake of legal protection, keeping up with the latest industry information is a professional responsibility.
According to the document, construction phase requirements apply when a new building is constructed; an addition is attached to an existing building; and when alterations are made to an existing building.