11/22/1981
https://www.presidency.ucsb.edu...
"He will outrank all other officers of the Armed Forces except the Chairman but is not considered by law a member of the Joint Chiefs of Staff unless serving as Acting Chairman."
"Mr. Walsh has my promise of complete cooperation."
"The Vice Chairman will serve as Acting Chairman of the JCS in the Chairman's absence."
"The Vice Chairman, who must be confirmed by the Senate, will serve a 2-year term and can be reappointed."