Recently, on the "learn klingon" facebook group, there was a discussion, with regards, whether the two nouns of a noun-noun construction can have adjectives.

For example {la' Dun vIghro' tIQ} "the ancient cat of the great commander".

Personally, I would avoid using such constructions, because they could be confusing.

However, I would like to ask, whether there is a rule prohibiting such constructions.

Because, although I've read that facebook thread, I still don't understand whether they're illegal or not.

How about logh Hop Hut teng­chaH Deep Space 9 from Skybox 99?

Or tlhI­ngan Duj­mey law’­qu’ Som­mey­Daq batlh cha’­lu’ has been emblazoned upon the hulls of countless Klingon Starships from Skybox SP1?

Sure, it's legal. And canonical.

-- 
SuStel
http://trimboli.name