However, the Legislature may provide that under appropriate circumstances and pursuant to definitions and procedures established by the Legislature, any person over the age of 55 years who resides in property which is eligible for the homeowner's exemption and any implementing legislation may transfer the base year value of the property entitled to exemption, with the adjustments authorized by subsection 5, to any replacement dwelling of equal or lesser value located within the same state and purchased or newly constructed by that person as his or her principal residence within 2 years of the sale of the original property.__For purposes of this section, "any person over the age of 55 years" includes a married couple one member of which is over the age of 55 years.__For purposes of this section, "replacement dwelling" means a building or structure or other shelter constituting a place of abode, whether real property and personal property, and any land on which it may be situated.__For purposes of this section, a 2-dwelling unit shall be considered as 2 separate single-family dwellings.__This paragraph shall apply to any replacement dwelling that was purchased or newly constructed on or after passage of this article.

In addition, the Legislature may authorize a government entity, after consultation with the local affected agencies within the government entity's boundaries, to adopt an ordinance making the provisions of this subdivision relating to transfer of base year value also applicable to situations in which the replacement dwellings are located in that government entity and the original properties are located in another county within this State.__For purposes of this paragraph, "local affected agency" means any city, special district, school district or community college district that receives an annual property tax revenue