The enactment of this Code of 1993 shall not be construed to impair any right existing, or affect any proceeding pending, at the time this Code takes effect; but all proceedings for the assessment of any tax, or collection of any tax or special assessment then remaining incomplete, may be completed pursuant to the provisions of this Code. The provisions of this Act shall apply to redemptions from sales made for taxes or special assessment previous to the taking effect hereof, and the mode of giving notice, and of issuing deeds upon certificates of purchase made for taxes.