The document defines taxable income and gross income for the purposes of taxation. It states that taxable income is gross income less any authorized deductions or exemptions. Gross income is defined broadly as all income from any source, including compensation, business income, property dealings, interest, rents, royalties, dividends, annuities, prizes, pensions, and partnership shares. The document goes on to list several exclusions from gross income for taxation, including life insurance proceeds, return of insurance premiums, gifts, damages from personal injury, income exempt by treaty, and certain retirement benefits.