Various exemplary embodiments relate to a method performed by a policy and charging rules node for managing usage of a subscriber. The method may include: defining a primary metering policy having a first applicability condition and a first quota; defining a secondary metering policy having attributes including a second applicability condition and at least one inherited attribute that references an attribute of the primary metering policy; determining that the second metering policy is applicable when the first applicability condition and the second applicability condition are true; selecting the secondary metering policy as an active metering policy; and managing subscriber usage according to the attributes of the secondary metering policy. In various alternative embodiments, the step of managing subscriber usage includes: measuring subscriber usage according to a rating factor of the secondary metering policy; and charging the measured subscriber usage to both the primary metering policy and the secondary metering policy.