https://nbaa.org/aircraft-operations/communications-navigation-surveillance-cns/reduced-vertical-separation-minima-rvsm/
May 11, 2022 - RVSM refers to airspace between flight level (FL) 290 and FL 410, with assigned altitudes separated by a minimum of 1,000 feet rather than the 2,000-foot...
vertical separationnational businessreducedminimarvsm
https://www.aopa.org/news-and-media/all-news/2002/august/08/aopa-objects-to-domestic-reduced-vertical-separation-implementation-date-(2)
Docket Management System U.S. Department of Transportation Room Plaza 401 400 Seventh Street, SW.
vertical separationaopaobjectsdomesticreduced