Taxation of AOPs/BOIs with unknown member shares: maximum marginal rate applied to deter tax avoidance.
Clause 311 mandates taxation of an AOP/BOI's total income at the maximum marginal rate where members' shares are indeterminate or unknown, and requires taxation at any higher rate applicable to any member; when shares are determinate, it taxes the whole income at the maximum marginal rate if a member's other income exceeds the exemption threshold, while portions attributable to members chargeable at higher rates are taxed at those higher rates, with a deeming provision treating shares as indeterminate if so at formation or thereafter.