RCW 9A.72.070Perjury and false swearing—Irregularities no defense.It is no defense to a prosecution for perjury or false swearing:(1) That the oath was administered or taken in an irregular manner; or(2) That the person administering the oath lacked authority to do so, if the taking of the oath was required or authorized by law.[ 1975 1st ex.s. c 260 s 9A.72.070.]
Washington Legal Code