Three-runway system consultancy and other related expenses includes amounts incurred for the statutory environmental impact assessment, preparation of the associated design details for new facilities and the study of funding options. 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.