If you are staying in Croatia for less than 90 days and have a CEPT licence you may operate as 9A/HOME_CALL.
If you are staying in Croatia for longer than 90 days, have a CEPT licence and wish to obtain permanent licence and Croatian callsign (9A) you need to do the following three steps:
1. Apply for a residence permit
The residence permit is issued by the Ministry of Foreign and European Affairs. For more information click here.
2. Apply for a callsign
Before submitting a license application you need a callsign proposal.
Croatian Amateur Radio Association is in charge for issuing a callsign proposal.
Send your request for a callsign proposal with the attached CEPT licence and a copy of the document showing your OIB number (the one you received from the Croatian Ministry of Foreign and European Affairs) to radioamateri@hamradio.hr
3. Apply for a licence
Once you have a callsign proposal, apply for a licence from The Croatian Regulatory Authority for Network Industries. More information find on their web page here.