(a) The declaration, including any CIC plat, may be amended only by vote or written consent of unit owners of units to which at least 67 percent of the votes in the association are allocated, or any greater or other requirement the declaration specifies, subject to the following qualifications:
(3) Except for amendments or supplemental declarations under subsection (a)(1) and (2), and except as provided in sections 515B.1-102(d)(3) and 515B.2-106(a)(2), the unanimous written consent of the unit owners is required for any amendment which (i) creates or increases special declarant rights, (ii) increases the number of units, (iii) changes the boundaries of any unit, (iv) changes the allocated interests of a unit, (v) changes common elements to limited common elements or units, (vi) changes the authorized use of a unit from residential to nonresidential, or conversely, or (vii) changes the characterization of the unit owner's interest in a cooperative from real estate to personal property, or conversely. Where the amendment involves the conversion of common elements into a unit or units, the title to the unit or units created shall, upon recording of the amendment, vest in the association free and clear of the interests of the unit owners and all secured parties holding security interests in units.
(4) In addition to any other requirements contained in this section, a declarant must execute an amendment that eliminates or modifies any special declarant rights held by that declarant.
(5) If any provision of this chapter, the declaration, the bylaws, or the articles of incorporation requires the consent of a secured party holding a security interest in a unit as a condition for the approval or effectiveness of an amendment to the declaration, the bylaws, or the articles of incorporation, the consent is deemed to be granted if the secured party's written refusal to consent is not received by the association within 60 days after the secured party receives from the association notice and a copy of the amendment, by certified United States mail, postage prepaid and return receipt requested. If the secured party has not otherwise provided to the association an address for notice, the association shall send the notice to the address, if any, set forth in the recorded instrument that evidences the security interest. This subsection shall not apply to an amendment that affects the priority of a secured party's security interest or the ability of a secured party to foreclose its security interest. In such cases, the number or percentage of secured parties whose consent is required by the instrument to be amended must consent to the amendment in writing.
(6) The declaration may specify less than 67 percent for approval of an amendment, but only if all of the units are restricted to nonresidential use.
(b) No action to challenge the validity of an amendment or a supplemental declaration may be brought more than two years after the amendment or supplemental declaration is recorded.
(c) Every amendment to a declaration or supplemental declaration shall be recorded in every county in which any portion of the common interest community is located and is effective only when recorded. If an amendment (i) changes the number of units, (ii) changes the boundary of a unit, (iii) changes common elements to limited common elements, where the limited common element is required by section 515B.2-110(c), to be shown on the CIC plat, (iv) changes limited common elements to common elements if the limited common elements are shown as limited common elements on the CIC plat, or (v) makes any other change that creates an inconsistency between the declaration, as amended, and the CIC plat, then an amendment to the CIC plat reflecting the change shall be recorded.