Text in force at 29-59: from 29-0, effective 1 Feb 1965.
Cockpit controls must be--
(a) Located to provide convenient operation and to prevent confusion and inadvertent operation; and
(b) Located and arranged with respect to the pilot's seats so that there is full and unrestricted movement of each control without interference form the cockpit structure or the pilot's clothing when pilots from 5'2" to 6'0" in height are seated.
29 FR 16150 · Source