RCW 28A.405.240: Conditions and contracts of employment—Supplemental contracts, when—Continuing contract provisions not applicable to.

No certificated employee shall be required to perform duties not described in the contract unless a new or supplemental contract is made, except that in an unexpected emergency the board of directors or school district administration may require the employee to perform other reasonable duties on a temporary basis.

No supplemental contract shall be subject to the continuing contract provisions of this title.