(a) Imposition of tax.-A tax determined in accordance with the rates set forth in this local law is hereby imposed for each taxable year, ending on or after July first, nineteen hundred sixty-six, but commencing prior to January first, nineteen hundred seventy-six, on the city taxable income of every resident individual, resident estate and trust. (b) Partners and partnerships.- A partnership as such shall not be subject to tax under this local law. Persons carrying on business as partners shall