Each time the loyalty level of a user is a match for a MatchLevel rule, the request goes to the masking rule below the MatchLevel rule. If the request is not a match for the MatchLevel rule, the request goes to the next MatchLevel rule until it reaches the end of the rule tree.

For example, a user with a loyalty level of one sends a request. The request moves through the rule tree in the following order:

The user is a match for the MatchLevel0AndAbove rule, so the rule directs the request to the MaskLevel0 masking rule and the Rule Engine applies the rule.
The request continues to the MatchLevel1AndAbove rule, which matches the request and directs the request to the MaskLevel1_1 rule.
The Rule Engine applies the MaskLevel1_1 and MaskLevel1_2 rules to the request.
The request continues to the MatchLevel2AndAbove, which is not a match. The request continues to the MatchLevel3AndAbove and MatchDefaultLevel rules. The request is not a match for the rules and the Rule Engine does not apply any more masking rules.