HB1999 – Allows the Department of Ecology to adopt Zero Emission Vehicle standards.
Prime Sponsor – Representative Kloba (D, 1st District,  Kirkland)
Current status – Had a hearing in the House Committee on Environment and Energy February 19th. Still in committee by 2019 cutoff; reintroduced and retained in present status for 2020 session.
Next step would be –  Action by the committee.
Legislative tracking page for the bill.
SB5811 is an identical companion bill in the Senate.

Comments –
SB5336 would also do this, but it includes a lot of other measures to reduce transportation emissions.

Summary –

The bill removes the prohibition on adopting the California Zero Emission Vehicle standards from the current law authorizing Ecology to adopt the rest of California’s emissions standards.

(It may also extend the range of vehicles that Ecology’s authorized to regulate some by changing its authority over the emissions from “medium duty passenger vehicles” to authority over “medium duty vehicles”.)