Section 2-103. Official city flag

a. The following design is hereby adopted
  as the design of the official flag of the city:
    1. A flag combining the colors orange,  white  and  blue  arranged  in
  perpendicular  bars  of  equal dimensions (the blue being nearest to the
  flagstaff) with the standard design of the seal of the city in blue upon
  the middle, or white bar, omitting the legend "Sigillum  Civitatis  Novi
  Eboraci,"  which  colors  shall  be the same as those of the flag of the
  United Netherlands in use in the year sixteen hundred twenty-five.
    b. The old guard of the city of New York is authorized  to  carry  and
  display  the  official  city flag at all its various functions, reviews,
  parades and receptions.
    c. The American flag shall be displayed on  all  city-owned  or  other
  buildings  occupied  by  any  city department or institution of whatever
  character on all days of the year, excepting Sundays.