The bonds or any part thereof may be sold when and as the County Council by resolution determines and until sold shall remain in the custody of the Department of Finance. Whenever in the judgment of the County Council it is deemed advisable that any part or all of the bonds shall be sold, the County Council may sell and dispose of the same at public sale after having advertised the same in the public press at least once each week for at least 2 weeks. No commission or other compensation shall be charged or paid to any members of the County Council for effecting the sale or negotiation of such bonds.