There is hereby established the South Dakota Retirement System supplemental pension benefit. The supplemental pension benefit shall be within and integral to the South Dakota Retirement System. It is the intent of the Legislature that the provisions related to the supplemental pension benefit shall be qualified under § 401(a) of the Internal Revenue Code and that the provisions constitute one aspect of a governmental plan as identified under § 414(d) of that code.
SDCL 3-12C-1501