Following the Road Code amendments, how often must a privately owned Albanian passenger car undergo the periodic technical inspection (kolaudimi), and how does that differ from a taxi?

1. Private cars every 6 months; taxis every 3 months
2. Private cars every 2 years; taxis and other service vehicles annually
3. Private cars and taxis alike every year, as before the amendments
4. Private cars every 5 years; taxis every 2 years