(1) Where more than three years have passed since the date of the last reserve study prepared by a reserve study professional, the owners of the units to which at least twenty percent of the votes are allocated may demand, in writing, to the association that the cost of a reserve study be included in the next budget and that the study be obtained by the end of that budget year. The written demand must refer to this section. The board of directors shall, upon receipt of the written demand, provide unit owners making the demand reasonable assurance that the board of directors will include a reserve study in the next budget and, if the budget is not rejected by the owners, will arrange for the completion of a reserve study.

(2) In the event a written demand is made and a reserve study is not timely prepared, a court may order specific performance and award reasonable attorneys' fees to the prevailing party in any legal action brought to enforce this section. An association may assert unreasonable hardship as an affirmative defense in any action brought against it under this section. Without limiting this affirmative defense, an unreasonable hardship exists where the cost of preparing a reserve study would exceed ten percent of the association's annual budget.

(3) A unit owner's duty to pay for common expenses shall not be excused because of the association's failure to comply with this section or RCW 64.34.382 through 64.34.390. A budget ratified by the unit owners under RCW 64.34.308(3) may not be invalidated because of the association's failure to comply with this section or RCW 64.34.382 through 64.34.390.