Limiting to property placed in service before January 1, 2006, the applicability of modifications to federal adjusted gross income of an individual or federal taxable income of a corporation for Maryland income tax purposes to reflect the determination of the maximum aggregate costs that a taxpayer may treat as an expense under Section 179 of the Internal Revenue Code for any taxable year without regard to the changes made to that section by the federal Jobs and Growth Reconciliation Act of 2003 for federal income tax purposes; etc.