RCW 9A.72.070 Perjury 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 § 9A.72.070.]