Tax treatment of business trust distributions: distributions retain their character and are taxed in unit holders' hands accordingly. Income distributed by a business trust is treated in the hands of unit holders as of the same nature and proportion as it was received by or accrued to the trust; the trust's total income is chargeable at the maximum marginal rate subject to specified provisions. Specified distributed amounts are to be charged as income of the unit holder, an exception excludes certain receipts under section 56, and payors must furnish prescribed statements detailing the nature of distributed income to unit holders and the prescribed authority.