54. (1) Subject to the provisions of this Constitution, the executive executive authority of the Federation shall extend –

(a) to the matters with respect to which the Federal Parliament has power to make laws; and

(b) to the exercise of such rights, authority, and jurisdiction as are exercisable by the Federation by virtue of any treaty or agreement:

Provided that the said authority does not, save as expressly provided in this Constitution, extend in any unit to matters with respect to which the Legislature of the unit has power to make laws.

(2) Notwithstanding anything contained in this section a unit and any officer or authority thereof may, until otherwise provided by the Federal Parliament or other competent authority, continue to exercise, in matters with respect to which the Federal Parliament has power to make laws for that unit, such executive authority or functions as the unit or officer or authority thereof could exercise immediately before the commencement of this Constitution.