The Indonesian government has moved to tighten its airspace security by introducing heavier fines for foreign aircraft entering its airspace without proper clearance. The new government regulation on airspace security under the 2009 Aviation Law stipulates that foreign aircraft flying through Indonesia’s airspace must have prior flight approval as well as diplomatic and security clearance, failing which they risk hefty fines of up to Rp 5 billion. In 2015, an aircraft tried to pass the Tarakan, North Kalimantan without clearance in 2015. The Indonesian military had been requesting heftier fines for many years, dating back to when current Presidential Chief of Staff Moeldoko was TNI commander. In 2014, Moeldoko argued that the cost of operating one Sukhoi jet fighter to pursue air space violations was Rp 400 million per hour.