Mich. Admin. Code R. 460.2532
Current through Vol. 24-21, December 1, 2024
Rule 32. The following plant ledgers and records shall be retained for the periods listed:
(a) Ledgers of utility plant accounts, including land and other detailed ledgers that show the cost of utility plant by classes. | 25 years. |
(b) Continuing plant inventory ledger, book, or card records that show the description, location, quantity cost, and similar information of physical units, or items, of utility plant owned. | 25 years after the plant is retired if mortality data are retained. For depreciation purposes, life or mortality study data shall be retained for the life of the corporation. |
Mich. Admin. Code R. 460.2532