I have done a search and come up with the following:

But then this will continue only until the end of this year. As of 1st January 2004 we will be back in the civilised world, kind of. I.e. Muzzle energy limit of 17 J (more or less the UK FAC limit), no barrel restrictions but (as was always the case here barring ancient times) no airgun hunting
With regards Polish Airgun laws. I understand that up to this point, barrels had to be smoothbore.

Can anyone confirm that this change in legislation has indeed taken place, and that there are no restrictions on PCP's in Poland.

Alex