Masterkeying Rules

1. Each Master Key bitting (from the list of 1000 supplied) can be used only ONCE.
   
   
2. Suite references are used in sequential order starting with 1 upwards and never repeated.
   
   
3. The maximum number of steps between each key notch is 5, i.e. 151375 is okay but 151975 is not allowable.
   
   
4. No more than 2 pins in a row can be alike i.e. 153322 is okay but 133322 is not allowable.
   
   
5. No more than 4 pins can be alike in any masterkey or servant key bitting.
   
   
6. If the cylinders are used in a sensitive area ensure that all the differ keys cannot be cut down to a masterkey. (Safety Check Yes on Elcon).
   
   
7. Records must be updates monthly, to UNION UK.