Opening a Rule Script 
You should have created the rule script in the Rules Composer.
For more information, see Rule Script
For more information, see Working with a Rule Script
In the Rules Navigator view, select the project node.
Under the Flow Rulesets section, select the flow ruleset.
Choose Open.
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Note
You can also open the flow ruleset from the Rules Navigator directly.
In the Rules Navigator view, expand the project node and select the flow ruleset.
Under the Rule Scripts section, select the rule script.
Choose Open.