Amends the Use Tax Act and the Retailers' Occupation Tax Act. Provides that, with respect to the sale of a manufactured home, if the purchase is the first purchase of the manufactured home for use as a dwelling and the purchaser certifies that the manufactured home will be affixed to a permanent foundation in the State, then the tax imposed by the Acts applies to 50% of the selling price (in the case of the Use Tax Act) or 50% of the gross receipts from the sale (in the case of the Retailers' Occupation Tax Act). Effective immediately.