This chapter applies to a motion for dismissal made in an action commenced before, on, or after the effective date of this chapter, except that in the case of an action commenced before the effective date of this chapter:
(a) A motion for dismissal made pursuant to notice given before, on, or within one year after the effective date of this chapter is governed by the applicable law in effect immediately before the effective date and for this purpose the law in effect immediately before the effective date continues in effect.
(b) This chapter does not affect an order dismissing an action made before the effective date of this chapter.