The U.S. aircraft register, updated daily
Special conditions · aircraft

Aero Commander Model 1121

Special conditions are rules the FAA writes for one design when the standard certification rules do not cover something new about it. These were for Rockwell Standard Corporation, Aero Commander Division. System: other and general.

What it applies to

Applicant
Rockwell Standard Corporation, Aero Commander Division
Makes
Aero Commander
Models
—
Effective
December 12, 1963
The FAA's document
On the FAA's site

Source: FAA special conditions (final) from the Dynamic Regulatory System; the Federal Register carries the same notices.