c:/dev/skygeo/src/iso2stac/stac_output_dynamic/catalog.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-the_norwegian_coastal_administration/collection.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-the_norwegian_coastal_administration/1e8d7811-87ea-429a-8d97-4ea6bbf6e010/1e8d7811-87ea-429a-8d97-4ea6bbf6e010.json
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c:/dev/skygeo/src/iso2stac/stac_output_dynamic/collection-the_norwegian_coastal_administration/collection.json
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https://lovdata.no/dokument/SF/forskrift/2019-12-11-1834?q=farledsforskrift
Transportnett Beredskapsbase NSDI data Norway Digital Geodata Act Felles datakatalog Samferdsel Norway coast fairway area delimitation main fairway secondary fairway Norwegian Coastal Administration regulations on fairways fairways National oceans
Fairways are indicated through the Regulation on fairways.

The entire coast of Norway is currently covered by a standardised reference system of various fairway categories. The fairway structure includes the network of maritime transport arteries and is a national geographical reference system for measures within administration, planning, development and operational activities in the coastal zone.

More about the fairway structure:

http://www.kystverket.no/Maritim-infrastruktur/Farleder/Farledsstrukturen/

The dataset shows the extent of the main and secondary fairway in terms of area.
Maritime transport - main and secondary fairways - area delineation