Mark, I believe that NOR 5.5 means that the sailors who won the 2013 youth qualifiers will be invited to the 2013 youth champs.

Here is the part about 2014 youth worlds:
20.8 Competitors in the following disciplines: Girls Singlehanded Dinghy and Boys
Singlehanded Dinghy (Laser Radial), Girls Doublehanded Dinghy and Boys
Doublehanded Dinghy (I-420), Open Skiff (29er), Open Multihull (Formula 16), and Boys
Windsurfer and Girls Windsurfer (RS:X with 8.5m2 sail and 60 cm fin), who are under the age of 19 years on 31 December 2014 (Born after 31 December 1995) are eligible to
have their scores considered as a qualifying event for the US Sailing Team Sperry Youth World Sailing Team to compete at the 2014 ISAF Youth World Championships.