It says minimum speed on instruments.
The semantics around IFR or IMC seems to be a deliberate way to avoid the real question - can you fly below 50 kts by sole reference to instruments or can't you?
The manufacturers appear to have worded the RFM to allow operators and legislators to dance around the issue with each believing they are in the right, despite being (probably) diametrically opposed since the legislators don't wan't people doing it (because it can be dangerous) yet the operators do want the ability to comply with PC1 departures in conditions that are not really VMC.