These expenses were mostly incurred after the Hong Kong SAR Government gave AAHK in-principle approval to adopt, for planning purposes, the three-runway system as the future development direction for HKIA. At HK$456 million, these expenses were much higher in 2013/14, reflecting an increased level of development activity. Depreciation and amortisation increased 1.8%, to HK$2,248 million, due to the completion of expansion and improvement projects for facilities and systems during the fiscal year.