You can find the Crystal Mark edition the the rules of the game of bowls on the World Bowls web site that you can then download to your device, at the following link:
http://www.worldbowls.com/laws-umpiring/laws-of-the-sport/
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MAIDENHEAD TOWN BOWLS CLUB
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Hi Trevor - Must get my Thinking cap on - Have heard of Crystal Meths but not Mark- Most of Bowls was by word of Mouth or a Warning by Persons - unmentioned -who Said - you are doing this wrong !! - little or No advice on what was right - just tried to enjoy - Roll on Summer. Will try & dig out Rule Books among my Hoardings of last 50 years - have a little time - will be at it later today .