(1) When submitting an integrated resource plan, clean energy implementation plan, clean energy action plan, or integrated system plan required by statute to the commission, a utility must demonstrate how its planned resource acquisition, resource retirement, and continued investment in or operation of existing resources are projected to meet its primary compliance obligation under RCW 19.405.040 (1)(a), in addition to any other minimum percentage of retail electric load established by the commission through an approved interim target, with renewable or nonemitting electricity in each compliance period beginning January 1, 2030.

(2) Each utility must meet the requirement in subsection (1) of this section through, at a minimum, an hourly analysis of the renewable or nonemitting output of the preferred resource portfolio, and how this is intended to meet its primary compliance obligation for each compliance period under RCW 19.405.040 (1)(a), or other minimum percentage of retail electric load established by the commission through an approved interim target, under expected renewable output conditions. If a plan referenced in subsection (1) of this section only includes one portfolio, for the purposes of this section, that portfolio is the preferred portfolio.