Three meters...how far will be go?

It is now law in Saskatchewan that you can not (or is that cannot---are we together on this?) smoke within three metres of the doors of public buildings.  http://www.health.gov.sk.ca/new-tobacco-laws  In the good old days a metre was the length from the tip of the nose to the hand when the arm was fully extended.  I begin to feel we are long nosed and short armed.  We better get the street painter guys out there to mark off the three metres.  We don't want measurement challenged people making mistakes.