manoeuvring speed bank angle

[SFI145]

If a manoeuvring speed is quoted as being Vref+(say) 50 up to what bank angle is this valid?

[BelArgUSA]

Vref+ "XX" maneuvering as per Boeing FCTMs is quoted at 25º bank with a flight director system, and to 30º for no flight director (raw data).
xxx
:8
Happy contrails

[Intruder]

...and gives at least a 15 deg AOB margin.