Change in proportions of parcel in different property classes
 25. (1) This section applies to a parcel that satisfies the following conditions: 1.  Portions of the parcel were included in different property classes for the previous year. 2.  Portions of the parcel are included in the same property classes for the taxation year and not in any other property class. 3.  The proportion of the assessment of each portion of the parcel in a property class has changed between the previous year and the taxation year. 4.  The change in the assessment for each portion of the parcel included in a property class for the taxation year is due only to a change in the proportion of the parcel included in each of the property classes, as a result of a change event described in clause (a) of the definition of “change event” in subsection 34 (2.2) of the Assessment Act.  O. Reg. 121/07, s. 25 (1). (2) The amount of taxes for municipal and school purposes for the previous year for the purposes of paragraph 1 of subsection 291 (2) of the Act for each portion of the parcel whose assessment increased between the previous year and the taxation year is determined as follows: 1.  Determine the amount of taxes that were levied on the portion of the property for the previous year under section 291, 293 or 294 of the Act. 2.  Determine the amount of taxes that would have been levied on the portion of the property for the previous year but for the application of Part XII of the Act. 3.  Divide the amount determined under paragraph 1 by the amount determined under paragraph 2. 4.  Determine the assessment of the portion of the property on the assessment roll for the taxation year. 5.  Determine the total assessment of the property on the assessment roll for the taxation year. 6.  Divide the amount determined under paragraph 4 by the amount determined under paragraph 5. 7.  Multiply the quotient determined under paragraph 6 by the total assessment of the property on the assessment roll for the previous year. 8.  Determine the amount of taxes that would have been levied in the previous year on the assessment amount determined under paragraph 7 but for the application of Part XII of the Act. 9.  Subtract the amount determined under paragraph 2 from the amount determined under paragraph 8. 10.  Multiply the remainder determined under paragraph 9 by the lesser of, i.  the quotient determined under paragraph 3, and ii.  1.0. 11.  Add the product determined under paragraph 10 to the amount determined under paragraph 1.  O. Reg. 121/07, s. 25 (2). (3) The taxes for municipal and school purposes for the previous year for the purposes of paragraph 1 of subsection 291 (2) of the Act for each portion of the parcel whose assessment decreased between the previous year and the taxation year is determined as follows: 1.  Determine the assessment of the portion of the property on the assessment roll for the taxation year. 2.  Determine the total assessment of the property on the assessment roll for the taxation year. 3.  Divide the amount determined under paragraph 1 by the amount determined under paragraph 2. 4.  Multiply the quotient determined under paragraph 3 by the total assessment of the property on the assessment roll for the previous year. 5.  Determine under section 291, 293 or 294 of the Act the amount of taxes that would have been levied for the previous year on the assessment amount determined under paragraph 4.  O. Reg. 121/07, s. 25 (3).