Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 486 - Employee commute options program
Section NR 486.11 - Recordkeeping and monitoring

Affected employers shall retain copies of their completed employee commute options compliance plan forms for a period of not less than 3 years. Employers shall also maintain records of information relevant to the development and implementation of alternative means of commuting strategies in their approved compliance plans. The department may inspect, verify and audit an employer's compliance plan records and monitor activities related to an employer's alternative means of commuting strategies.