(1) Except in cases of amendments that may be executed by a declarant under RCW 64.34.232(6) or 64.34.236; the association under RCW 64.34.060, 64.34.220(5), 64.34.228(3), 64.34.244(1), 64.34.248, or 64.34.268(8); or certain unit owners under RCW 64.34.228(2), 64.34.244(1), 64.34.248(2), or 64.34.268(2), and except as limited by subsection (4) of this section, the declaration, including the survey maps and plans, may be amended only by vote or agreement of unit owners of units to which at least sixty-seven percent of the votes in the association are allocated, or any larger percentage the declaration specifies: PROVIDED, That the declaration may specify a smaller percentage only if all of the units are restricted exclusively to nonresidential use.

(2) No action to challenge the validity of an amendment adopted by the association pursuant to this section may be brought more than one year after the amendment is recorded.

(3) Every amendment to the declaration must be recorded in every county in which any portion of the condominium is located, and is effective only upon recording. An amendment shall be indexed in the name of the condominium and shall contain a cross-reference by recording number to the declaration and each previously recorded amendment thereto.

(4) Except to the extent expressly permitted or required by other provisions of this chapter, no amendment may create or increase special declarant rights, increase the number of units, change the boundaries of any unit, the allocated interests of a unit, or the uses to which any unit is restricted, in the absence of the vote or agreement of the owner of each unit particularly affected and the owners of units to which at least ninety percent of the votes in the association are allocated other than the declarant or such larger percentage as the declaration provides.

(5) Amendments to the declaration required by this chapter to be recorded by the association shall be prepared, executed, recorded, and certified on behalf of the association by any officer of the association designated for that purpose or, in the absence of designation, by the president of the association.

(6) No amendment may restrict, eliminate, or otherwise modify any special declarant right provided in the declaration without the consent of the declarant and any mortgagee of record with a security interest in the special declarant right or in any real property subject thereto, excluding mortgagees of units owned by persons other than the declarant.