North American Product Classification System (NAPCS) Canada 2017 Version 1.0
- 531 - Transportation support services
- 53141 - Air transportation support services
- 531411 - Air terminal services
- 5314111 - Air traffic control and navigation services
- 5314112 - Fixed base operation (FBO) services
- 5314113 - Airport operation and administration services
- 5314114 - Aircraft parking services
- 531412 - Other air transportation support services
- 5314121 - Other air transportation support services
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