Member States shall ensure that boatmasters hold specific authorisations issued in accordance with Article 12 when:

1. (a)

   sailing on waterways that have been classified as inland waterways with a maritime character pursuant to Article 8;

2. (b)

   sailing on waterways that have been identified as stretches of inland waterways with specific risks pursuant to Article 9;

3. (c)

   sailing with the aid of radar;

4. (d)

   sailing craft using liquefied natural gas as fuel;

5. (e)

   sailing large convoys.