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When you add a rule and set the value in the fields, it will overwrite parameters specified in the respective columns of the file. If you leave fields empty, it will take the parameters from the file. 

If you a add a There is one default rule with * code for a certain service, that affects all the imported codes. The not specified columns of the imported rates will be filled in with the respective field values of this code rule. You can add rules with a * code for all services. The list of code rules fields is as follows:

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