Wis. Admin. Code § Trans 300.51
(1) Every school bus shall be equipped with the following illuminated instruments to indicate malfunctions or gauges to indicate a measure or capacity:
History: Cr. Register, February, 1983, No. 326, eff. 3-1-83; am. (1) (a), (c), (d), (f), Register, February, 1995, No. 470, eff. 3-1-95.