Pyro has been legalised in Norwegian football stadiums since late last year, albeit under fairly strict regulation.
The use of pyrotechnic devices (legally) has to be approved by the league and the individual clubs’ security teams - so an application for their use needs to come in from a fans group prior to a particular match. Even then, only named individuals can use the pyro and they can only be set off on the first row of blocks in the stand.
In terms of how the legislation is working in practice, we’re hearing different things from different fans groups’ experiences. Some have reported that a number of clubs have used the excuse of formerly defined legislation to clamp down harder on any pyro show that does not fit to the letter of the new law - ironically meaning that the general/informal use of pyro becomes further criminalised. Others have experienced the opposite - noting that if fan clubs have a currently positive relationship with the club and their security they are happy for most pyro shows to go ahead without heavy policing/strict following of the rules as long as initial approval is granted.
Either way, it’s legal pyro in Norwegian football. Interesting stuff.