For The Love Of Port

Sorry for asking, but I need a reminder on how old "Very Old" Port is. Was it a classification used before TWAIOA came about? Was there ever any control over what could be classified a Very Old Port? Roughly how old is a Very Old Port and when did they stop using that expression on bottlings?
Thanks.

IIRC, a Port that is at least 10 years old may be labeled as an "Old" Port, while a Port that is at least 30 years old may be labeled as a "Very Old" Port. There is also now a new category of "Very Very Old" which is for Ports that are at least 80 years old.

For bottles going to the US, the limit is 40 Years Old to be labeled "Very Old" Port.

Thanks Glenn.