To prevent actual or likely multistate taxation, the tax imposed by this Act does not apply to the use of tangible personal property in this State under the following circumstances:
If tax becomes due under this subsection (h-2) because of the purchaser's use of the aircraft in this State, the purchaser shall file a return with the Department and pay the tax on the fair market value of the aircraft. This return and payment of the tax must be made no later than 30 days after the aircraft is used in a taxable manner in this State. The tax is based on the fair market value of the aircraft on the date that it is first used in a taxable manner in this State.
For purposes of this subsection (h-2):
"Based in this State" means hangared, stored, or otherwise used, excluding post-sale customizations as defined in this Section, for 10 or more days in each 12-month period immediately following the date of the sale of the aircraft.
"Post-sale customization" means any improvement, maintenance, or repair that is performed on an aircraft following a transfer of ownership of the aircraft.
"Prepurchase evaluation" means an examination of an aircraft to provide a potential purchaser with information relevant to the potential purchase.
"Registered in this State" means an aircraft registered with the Department of Transportation, Aeronautics Division, or titled or registered with the Federal Aviation Administration to an address located in this State.
This subsection (h-2) is exempt from the provisions of Section 3-90.
35 ILCS 105/3-55