The provisions of Alaska Stat. § 14.25.310 – 14.25.590 apply only to teachers who first become members on or after July 1, 2006, to members who are employed by employers that do not participate in the defined benefit retirement plan established under Alaska Stat. § 14.25.009 – 14.25.220, to former members under Alaska Stat. § 14.25.220, or to members who transfer into the defined contribution retirement plan under Alaska Stat. § 14.25.540.