As used in this part:

    (a) "Authority" means all of the following:

    (i) An authority as defined in part 2.

    (ii) An authority as defined in part 3.

    (iii) An authority as defined in part 4.

    (iv) An authority as defined in part 6.

    (v) An authority as defined in part 7.

    (vi) An authority as defined in part 8.

    (b) "Municipality" means all of the following:

    (i) A municipality as defined in part 2.

    (ii) A municipality as defined in part 3.

    (iii) A municipality as defined in part 4.

    (iv) A municipality as defined in part 6.

    (v) A municipality as defined in part 7.

    (vi) An municipality as defined in part 8.