MI HB4571

Changes aviation fuel tax from a fixed 3 cents per gallon to 2% of the average wholesale price, with a minimum floor of 6 cents per gallon.

Removes the 1.5 cents per gallon refund previously available to airline operators conducting interstate scheduled operations.

Requires the Department of Treasury to determine and publish the tax rate quarterly based on a 12-month rolling average of wholesale prices, with adjustments limited to 1% per quarter.

Exempts aviation fuel purchased for formulating leaded racing fuel from the tax if the purchaser provides written certification and the fuel is labeled "aviation fuel exempt for LRF."

Mandates the Department of Treasury to complete cost studies by January 1, 2014 and every 10 years thereafter to evaluate the impact of the tax changes.