The optional retirement system established in this chapter is administered in the same manner provided in chapter 21 of this title; credits for prior service and collection of contributions are determined through reference to that chapter; provided, that where the provisions of that chapter conflict with this chapter, then the provision of this chapter control. Liability of contributions is enforced in the same manner as stated in chapter 21 of this title.
R.I. Gen. Laws § 45-21.2-4