Mich. Admin. Code R. 460.2519
Rule 19. Except as provided elsewhere in these rules, the following contract and agreement records shall be retained for the periods listed:
(a) Service contracts, such as for management, accounting, and financial services including related memoranda and revisions. | See R 460.2522(b)(i) if they affect cost of plant; otherwise, 6 years after expiration or cancellation or until the conclusion of any contract disputes or governmental proceedings pertaining to these contracts, whichever is later. |
(b) Contracts with other utilities for the purchase, sale, or interchange of product, including related memoranda or revisions. | 6 years after expiration or cancellation or until the conclusion of any contract disputes or governmental proceedings pertaining to these contracts, whichever is later. |
(c) Leases pertaining to rentals of property to or from others. | 6 years after expiration or cancellation or until the conclusion of any contract disputes or governmental proceedings pertaining to these contracts, whichever is later. |
(d) Contracts and agreements with individual employees, labor unions, company unions, and other employee organizations relative to wage rates, hours, and similar matters. | 6 years after expiration or cancellation or until the conclusion of any contract disputes or governmental proceedings pertaining to these contracts, whichever is later. |
(e) Contracts, agreements, and other essential records necessary to the carrying out of the functions of an employee's stock purchase or other type of employees' saving plan. | 6 years after expiration or cancellation. |
(f) Memoranda essential to clarifying or explaining provisions of contracts listed in subdivisions (a) to (e) of this rule. | For same periods as contracts to which they relate. |
(g) Card or book records of contracts leases, and agreements made, which show dates of expirations, dates of renewals, memoranda of receipts, and payments under such contracts, leases, and agreements. | For same periods as contracts to which they relate. |
(h) Contracts or agreements for the acquisition or disposal of investments, excluding temporary cash investments. | 25 years after disposal. |
Mich. Admin. Code R. 460.2519