(a) Articles 1 through 5 of this chapter apply only to condemnation actions commenced on or after January 1, 1986.
(b) Article 1 and Articles 6 through 16 of this chapter apply to the fullest extent practicable to pending condemnation actions commenced before January 1, 1986, with respect to issues on which a judgment has not been entered, and with respect to issues that are retried on or after January 1, 1986, pursuant to an order of a trial or appellate court.
(c) In any condemnation action in which an appeal or a motion to modify or vacate the verdict or judgment, or to grant a new trial, was pending on January 1, 1986, the law applicable before January 1, 1986, governs the determination of the appeal or motion.