The answer is interesting and explains .VIN is not only used to qualify wine:
...but Registrants (people who buy domain names) with the intention to use these domains to sell wine illegally could have them terminated:
"Donuts will monitor name usage to prevent certain types of abusive activity and may terminate registrations if registrants do not follow all applicable laws. For example, it would be grounds for termination if a .VIN registrant used the gTLD to illegally produce or sell wine."
Specification 5 can be read on page 285 of the Applicant Guidebook.
If I already have an idea of how all this is going to end, I understand the position of the applicant who has been following the methodology provided by ICANN with its Applicant Guidebook.
The official document is available online (.VIN answer is available down the page).