FDI limits in civil aviation set across airports, air transport and services, with approvals and foreign-airline equity restrictions. FDI rules set sector-specific ceilings and entry routes for airports, air transport services and other aviation activities, subject to Aircraft Rules and Civil Aviation Requirements. Airports: greenfield projects allow full FDI under the automatic route; existing airports permit full FDI with prior government approval when domestic ownership thresholds are exceeded. Air transport: foreign airlines cannot hold equity in passenger scheduled, non-scheduled or charter operators but may invest in cargo, helicopter and seaplane services. Distinct FDI caps and automatic-route permissions apply to scheduled carriers, non-scheduled/charter/cargo operators, ground handling, maintenance and training entities, with regulatory and security conditions.