The KAVB are the (Dutch) Royal General Bulb Growers' Association and an international registration authority for bulbs, including snowdrops. They are not widely used to register UK snowdrop cultivars but a few years ago I made a commitment to try after Gerard Oud advocated this.
Although I procrastinated and there was a bit of a learning curve, in the end the process proved remarkably painless and registration is free if you are outside the Netherlands. It is necessary to complete a form (describing the snowdrop) and supply a colour photograph. I was able to do this electronically by contacting the very helpful and friendly Saskia Bodegum at the KAVB. Today I received a PDF certificate recording the registration of my cultivar 'Cressida'. The name will subsequently appear in print so I hope this will make it fully official by meeting the requirement of the ICNCP.
I recommend anyone who wants to 'officially' name a new snowdrop cultivar to try this route. All I need now is for Prince Harry to get engaged to Cressida Bonas to boost the popularity of the name Cressida (which I chose some years ago e.g.
http://www.srgc.net/forum/index.php?topic=5090.msg139478#msg139478 )