By December 31, 2019, consistent with the authority under RCW 90.56.210, the department must update rules for contingency plans to require:
(1) Covered facilities to address situations where oils, depending on their qualities, weathering, environmental factors, and method of discharge, may submerge or sink in water; and
(2) Standards for best achievable protection for situations involving the oils in subsection (1) of this section.