The Church of Sit-Up Cycling was established to allow believers in safe, leisurely cycling to practice their wholly rational faith without fear of a fine.
In Vancouver, BC, it is illegal to sit on a bicycle without a plastic hat. An exception is made if the wearing would interfere with an essential religious practice.
[Editor's note - Ahh, I see where this is going]
The Church believes that mandatory helmet laws encourage fewer, faster cyclists, when in fact more, slower cyclists would make a safer and more pleasant city for all.
And for more clarity, from the mission statement on their website:
Wearing their normal work and play clothes is an essential religious practice of members of the Church of Sit-Up Cycling. This may or may not include wearing plastic hats.
Believers wholly endorse the use of such accident-preventing safety measures as lights, bells, height, strict compliance with traffic signals, a leisurely pace and the use of dedicated cycling streets and lanes.