Strictly attentive to detail; meticulous or fastidious, particularly to codes or conventions. (adjective)
Precise or scrupulous; finicky or nitpicky. (adjective)
Examples of word punctilious
It is no accident that the word "punctilious" ( "attentive to formality or etiquette") comes from the same original root word as punctuation.
In conduct, this animus expressed itself in a kind of punctilious propriety.
I made no complaint, but Wolf Larsen demanded the most punctilious sea etiquette in my case, — far more than poor Johansen had ever received; and at the expense of several rows, threats, and much grumbling, he brought the hunters to time.
He had punctilious but easy manners and a nice dry sense of humor.
Many Wyoming entities and businesses are punctilious about rules.