"Political subdivision" includes a statutory or home rule charter city, a county, a school district, a town, a watershed management organization as defined in section 103B.205, subdivision 13, or an instrumentality thereof, including but not limited to instrumentalities incorporated under chapter 317A, having independent policy-making and appropriating authority. For the purposes of this section and section 471.981, the governing body of a town is the town board. The term also includes the Nonprofit Insurance Trust incorporated under chapter 317A and its members incorporated under chapter 317A.
"Pool" means any self-insurance fund or agreement for the reciprocal assumption of risk established by or among two or more political subdivisions for coverage of their respective risks including, but not limited to, the pools described in section 471.982, subdivision 3. Except in connection with provisions in sections 471.981 and 471.982 that relate to bonding, "pool" does not include a self-insurance pool for employee health benefits under section 471.617.