The New York Convention was a treaty that regulated the conduct of physics courses at a collegiate (Quebec) or introductory, undergrad level. Among other things, the signatories were to supply physics exams with three significant digits. It was called as such because the first signatory was an university in New York City. Most Terran introductory-level physics textbooks of the 21st century were written within the NY Convention's stipulations. (RIS Bouteina: "New York Convention")
The New York Convention stipulated, namely, that all questions were to be answered with three significant digits.