Englishal
It is correct - you may not descend below 1000' on your approach until the RVR or visibility is above your minimum. That is ICAO law, as taught in the ATPL syllabus, and I believe incorporated into JARs.
My understanding is that the assumptions here that the extended RVR minimum for IMC-rated pilots is a mandatory limit is correct - this one is not a recommendation, but a requirement.