2010 CBC Chapter 7A Section 706A.3 prohibits ventilation openings on the underside of eaves and cornices. Exception: The enforcing agency may accept or approve special eave and cornice vents that resist the intrusion of flame and burning embers.
The following Manufacturer's have venting products approved by the State Fire Marshal as meeting Section 706A.3:
Exterior Wall Siding and Sheathing, Horizontal Projection Underside, Decking, and Windows tested to meet SFM Standards can be found in the latest updated Building Materials Listing Web Page for Construction Assemblies and Components. Use this link to find the: Building Materials Listing for Wildland Urban Interface (WUI) materials.
Check the button to search by number, search for 8110, 8120, 8140, 8150, 8160, and 8180.