The Council may from time to time appoint consulting employees to perform technical or scientific services whose employment shall continue only so long as the particular occasion shall continue and who shall not be subject to the civil service rules of this Charter and of whom the qualifications elsewhere prescribed in this Charter shall not be required. [May 3, 1913, new sec. 105; rev. 1914, sec. 83; 1928 pub., sec. 83; 1942 recod., sec. 2-504; rev. Nov. 6, 1962.]