The right of a person to a retirement allowance, the retirement allowance itself, the refund of a person's accumulated contributions, any death benefit, any other right accrued or accruing to a person under this chapter and the money in the various funds created by this chapter are not subject to execution, garnishment, attachment or any other process and are unassignable except that: [1991, c. 746, §1 (RPR); 1991, c. 746, §10 (AFF).]