D Atc said:
Any technical issue relies on the absolute lack of ambiguity. If I say "1 minute" I'm referring to 60 times "the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom" which remains the same regardless of which country said caesium atom happens to be (luckily).
True enough unless one is talking about navigation...
Things are rarely as simple, or as complicated, as they may seem at first glance.