When the S-Tec System Fifty Five X (55X) Autopilot with Altitude Selector / Alerter is installed in the Cirrus Design SR22, this Supplement is applicable and must be inserted in the Supplements Section (Section 9) of the Cirrus Design SR22 Pilot's Operating Handbook. This supplement is not included with the purchase of a POH and must be ordered separately. Note: This item is drop-shipped to you directly from our vendor.