Mich. Admin. Code R. 460.2550
Current through Vol. 24-21, December 1, 2024
Rule 50. The following billing data shall be retained for the periods listed:
| (a) Billing department copies of contracts with customers (in addition to contracts in general files). | Destroy at option. |
| (b) Service and inspection orders from which customers are charged and sundry charge advices. | 1 year. |
| (c) Authorizations for charges under utility service contracts. | 1 year after expiration of contract. |
| (d) Standard billing sheets or schedules that show computed bills of varying consumption according to rates. | Destroy at option. |
Mich. Admin. Code R. 460.2550