[Add new paragraph just before paragraph that starts "Train crew members..."]"For part (b) in historic homes, gut-rehab homes, or other cases where part of an exterior wall cavity is inaccessible, LEED for Homes follows the guidance provided by EPA in Note 1 of the Thermal Bypass Inspection Checklist (TBC): "verification of measures in the thermal bypass inspection checklist (TBC) are subject to the judgment and discretion of the energy rater." If an energy rater is satisfied that the methodology and results of infrared testing on a project meet the TBC requirements, this is acceptable. Similarly, if the home energy rater is satisfied that a specific approach to blown-in insulation meets the TBC requirements on a project, this is acceptable."