Washington Revised Code Title 4. Civil Procedure § 4.36.080. Conditions precedent, how pleaded

In pleading the performance of conditions precedent in a contract, it shall not be necessary to state the facts showing such performance, but it may be stated generally that the party duly performed all the conditions on his or her part; and if such allegation be controverted, the party pleading shall be bound to establish, on the trial, the facts showing such performance.