Washington Revised Code Title 29A. Elections § 29A.12.050. Approval required--Modification

If voting systems or devices or vote tallying systems are to be used for conducting a primary or election, only those that have the approval of the secretary of state or had been approved under this chapter or the former chapter 29.34 RCW before March 22, 1982, may be used. Any modification, change, or improvement to any voting system or component of a system that does not impair its accuracy, efficiency, or capacity or extend its function, may be made without reexamination or reapproval by the secretary of state under RCW 29A.12.020.