Timeline of the vz58 (and Swiss arms) bans
2014 Original vz58 ban (No good articles about the cz858 specifically but it happened at the same time.)
Some vz58/cz858/FSN-01 (and of those only a few years of imports) rifles were found to be full auto recievers converted to semi auto.
The RCMP at the time reclassified these specific rifles as prohibited as they would have been 12.3 and ineligible for purchase.
An amnesty was put in place while the government sorted out what to do with the EST 4000 affected vz58.
2015 Bill C-42 passes the "common sense firearms act"
This bill among other things allowed for the government to prescribe firearms to be "non-restricted". Also of note it required that any changes to a classification of a firearm must be done in the first year following the issuance of an FRT.
The vz-58's named in the 2014 reclassification were prescribed to be non-restricted(or restricted based on barrel length). So they despite being 12.3 could be used bought and sold as regular rifles.
2019 Bill C-71 reverses aforementioned changes in Bill C-42
vz58's that were named non-restricted are now back to prohibited and based on the wording of the bill it now likely includes all date ranges not just the limited time frame. Leaving only models that had no issue with using full auto recievers as NR (CSA vz58, Kodiak WR762).
RCMP was given expanded powers to reclassify firearms. Prescribed non-restricted class was removed from the Firearms Act.
Firearms that were registered before an arbitrary day almost a year PRIOR to the bill becoming law could be grandfathered details to be determined at a later date.
2020 May 1 OIC
The Trudeau government announces a OIC banning many types of semi-automatic rifles. Among them is the rest of the VZ-58 family.
Grandfathering as noted in C-71 is suspiciously absent and has not been heard of since.