Description of the illustration mng_grp_mult_acc_bll_hier_2.gif

This figure shows two hierarchical account groups, each containing one parent and one child account. The first account group contains two paying bill units and no nonpaying bill units. The second account group contains three nonpaying bill units. The nonpaying bill units are children of the paying bill units in the first account group. Hence, each paying bill unit is the top-level parent of a bill unit hierarchy that contains bill units from two account groups.