A marker you receive when POTUS signs an EO?
Interesting anon. Piqued my interest. Not sure if it's in reference to this, but this is interesting too.
Presidential Memorandum for the Secretary of Defense
"Without Presidential action under section 303 of the Act, United States industry cannot reasonably be expected to provide the production capability for AN/SSQ series sonobuoys adequately and in a timely manner."
https://www.whitehouse.gov/presidential-actions/presidential-memorandum-secretary-defense-11/
http://www.ultra-electronics.com.au/resources/Sonobuoy%20techsystems.pdf
https://fas.org/man/dod-101/sys/ship/weaps/an-ssq-53.htm