I was surprised that WA did this, so I went to check if what you said was true, turns out, they actually didn't ban non-electric vehicle sales in 2030.
line 36 & 37: Nothing in this section: a) Authorizes any state agency to restrict the purchase, sale, or registration of vehicles that are not electric vehicles;
and the actual quote around 2030(starting @ line 16):
"... then a goal is established for the state that all publicly owned and privately owned passenger and light duty vehicles of model year 2030 or later that are sold, purchased, or registered in Washington state be electric vehicles."
The actual bill: https://lawfilesext.leg.wa.gov/biennium/2021-22/Pdf/Amendmen...
On page 12:
line 36 & 37: Nothing in this section: a) Authorizes any state agency to restrict the purchase, sale, or registration of vehicles that are not electric vehicles;
and the actual quote around 2030(starting @ line 16):
"... then a goal is established for the state that all publicly owned and privately owned passenger and light duty vehicles of model year 2030 or later that are sold, purchased, or registered in Washington state be electric vehicles."