EVS minima in Europe part 91
CJ2driver;
Allow me re-phrase your question slightly so that I may answer it more precisely. Can a pilot using EVS start the approach when the reported RVR is less than the published minima? The answer is yes. With a few caveats.
The aircraft has a certified EFVS (enhanced flight vision system, which is EVS displayed in a HUD). The pilot is qualified, having attended an approved training course. In Europe, the reported RVR must not be less than that specified in EU OPS 1.430, Appendix 1, Table 9. Commercial operators must be authorized via their AOC or OPSpecs, and the procedures must be detailed in their Operations Manual. US Part 91 operators are authorized in accordance with AC 90-106 and do NOT need an LOA to use EVS for Standard Category I operations. Other regulations, such as 14 CFR 91.175 in the US, may apply and approved training courses will cover these issues.