Regardless of how the Activation Specification is created, the location of the destination is fixed at configuration time, and so we can know exactly which bus member an MDB should connect to.

Exemptions are fixed amounts per family member. Exemptions are subtracted from adjusted gross income (AGI) and phased out at high-income levels.

But in a real setting, the members in the group are not fixed, thus the group manager must delete the useless member in need.