(c) For purposes of subdivision (a), the Legislature may provide that the term “newly constructed” does not include any of the following:
(1) The construction or addition of any active solar energy system.
(2) The construction or installation of any fire sprinkler system, other fire extinguishing system, fire detection system, or fire-related egress improvement, as defined by the Legislature, that is constructed or installed after the effective date of this paragraph.
(3) The construction, installation, or modification on or after the effective date of this paragraph of any portion or structural
component of a single- or multiple-family dwelling that is eligible for the homeowner’s exemption if the construction, installation, or modification is for the purpose of making the dwelling more accessible to a severely disabled person.
(4) The construction or installation of seismic retrofitting improvements or improvements utilizing earthquake hazard mitigation technologies, that are constructed or installed in existing buildings after the effective date of this paragraph. The Legislature shall define eligible improvements. This exclusion does not apply to seismic safety reconstruction or improvements that qualify for exclusion pursuant to the last sentence of the first paragraph of subdivision (a).
(5) The construction, installation, removal, or modification on or after the effective date of this paragraph of any portion or structural component of an existing building or
structure if the construction, installation, removal, or modification is for the purpose of making the building more accessible to, or more usable by, a disabled person.
(6) The construction or addition, on or after January 1, 2010, of a small wind turbine or geothermal heat pump system, as defined by the Legislature.