Is there a sectioning procedure available for the rear rails?

Toyota does not have a sectioning procedure for the rear rails.

Per Toyota: A "Method Not Approved" is "Sectioning at Non-Specified Locations"

The bulletin can be found at techinfo.toyota.com

For short videos that show how to purchase and access the Toyota collision repair information, check out the Toyota OEM Information page.

Check out the I-CAR Collision Repair News article: How to Find Toyota/Lexus CRIBs

Ask I-CAR