Section 8.2.6 and section 8.4 in toto.
https://apps.dtic.mil/sti/pdfs/AD1048313.pdf
AERIAL REFUELING SYSTEMS ADVISORY GROUP
Guidance document
Aerial Refueling Boom/Receptacle
8.2.6 Toggle Latches.
The receptacle cavity should be equipped with actuated toggle latches are specified in ATP- 3.3.4.5 paragraph 1.19 and ATP-3.3.4.5 D (D-3) to hold the boom in the locked position during aerial refueling. The toggle latches should function as required in paragraph 8.4 below.
8.4 Receptacle/UARRSI Toggle Latches
8.4.1 Toggle Latch Response Time. The toggle latches should latch or unlatch as specified in ATP-3.3.4.5 paragraph 1.19, item 5.d.
8.4.2 Tension Disconnect. The latch actuator should contain an integral relief mechanism to permit disconnects by forcing the latches open. The latch mechanism should hold the boom nozzle in the locked-in position as specified in ATP- 3.3.4.5 paragraph 1.19, item 5.
8.4.3 Toggles Spring Loaded Open. The receptacle toggle latches should be spring loaded to the open position in the event of toggle shaft breakage or loss of actuation power as specified in ATP-3.3.4.5 paragraph 1.19, item 5.c(1).
8.4.4 Toggle Shaft Structural Fuse. The toggle shafts should break under a tension force, produced by the tanker boom on disconnect as specified in ATP-3.3.4.5 paragraph 1.19, item 5.c.(2).
8.4.5 Operator Initiated Normal/Override. The tanker/receiver aircraft should be provided normal and override modes for latched and disconnect modes of the system.
You can buy a copy of ATP-3.3.4.5 (Stanag 7191) from the link below for $10
https://www.techstreet.com/standards...uct_id=1983202