This subdivision shall be subject to the limitations specified in subdivision (d).
In the case of coowners whose original property is a multiunit dwelling, the limitations imposed by paragraphs (2) and (3) shall only apply to coowners who occupied the same dwelling unit within the original property at the time specified in paragraph (2) of subdivision (b).
This section shall not apply unless the transfer of the original property is a change in ownership that either (1) subjects that property to reappraisal at its current fair market value in accordance with Section 110.1 or 5803 or (2) results in a base year value determined in accordance with this section, Section 69, or Section 69.3 because the property qualifies under this section, Section 69, or Section 69.3 as a replacement dwelling or property.
If the replacement dwelling is purchased or newly constructed after the transfer of the original property, "base year value of the original property" also includes any inflation factor adjustments permitted by subdivision (f) of Section 110.1 for the period subsequent to the sale of the original property. The base year or years used to compute the "base year value of the original property" shall be deemed to be the base year or years of any property to which that base year value is transferred pursuant to this section.
For the purposes of this paragraph, except as otherwise provided in paragraph (4) of subdivision (h), if the replacement dwelling is, in part, purchased and, in part, newly constructed, the date the "replacement dwelling is purchased or newly constructed" is the date of purchase or the date of completion of construction, whichever is later.
Ca. Rev. and Tax. Code § 69.5