I'd suggest you re-read the rules.
3.a.ii. For the purpose of these definitions, the Standard Fittings are the:
Plastic cunningham fairlead
Plastic cunningham clam cleat
Mainsheet block
Plastic outhaul clam cleat
Plastic outhaul fairlead
Vang cleat block
Vang key block
Vang key
Plastic traveller fairleads
Plastic traveller clam cleat
3.a.iii An “Optional” fitting is a fitting or block that replaces, or is additional to, a Standard Fitting as allowed by these Rules.
3.a.iv A “Builder Supplied” fitting replaces a Standard Fitting, and is supplied only by the Builder, as allowed by these Rules.
3.a.x.“Builder Supplied” Vang Cleating Fitting
- The vang cleat block may be replaced with a “Builder Supplied” vang cleating fitting which incorporates “Turning Points” and a cam cleat.
These photos show the 2 Class legal “Builder Supplied” vang cleating fittings:
So the standard vang fitting is the old brown Holt-Allen fitting. That I assume we agree on.
The new fittings are the Harken Vang fitting and Allen Vang Fitting. As I said, I've only seen the Allen fitting once, so I can't comment on it. But the Harken fitting when supplied by the builder (sorry I used "Manufacturer" incorrectly before) has Laser stamped on it. It really doesn't matter if you can see the details in the pictures. The builder supplied fitting has laser on it and are legal. Other Harken Vang fittings not supplied by the builder won't be stamped with Laser on it and therefore they are illegal. If the Laser builders suddenly started to supply Harken Vang fittings without the Laser stamp, then suddenly as a measurer, you could differentiate between builder supplied and non builder supplied fittings and then you would need to pass the fitting, whether or not it had been "builder supplied".
As I said previously, the rules were becoming totally unworkable before because of the amount of new equipment coming along, combined with a whole heap of "practice" equipment, it's partially why I got out of being a measurer.
I've argued with competitors many times over whether their boats were legal. The basic thing was at a specific inspection, nothing illegal was detected. Give me 6 hours I can thoroughly check to see if a boat is legal (a copy of the builders manual would help). I will want to lock your boat up for 24 hours for it to come into temperature etc equilibrium (STP - Standard Temperature and Pressure) so all the measuring equipment is calibrated etc, a top section can alter in length by several millimetres depending on the temperature. Typically I would do a boat fully rigged and then fully unrigged in under 5 minutes, I know I will miss things, I know the people assisting may not be fully aware of the rules and pass things I would fail and I know different chief measurers will focus on different items, that is life. I used jigs for a lot of the measuring and those jigs were pass or fail and that was principally where I let assistants help. I've also had many competitors change their boats around after going through measuring (a whole national squad team, for both Women's and Open Radial Worlds, Takapuna NZ), resulting in their boats being illegal when they were being launched on day 1.