(1) Graduating high school students must meet the following criteria to be awarded the Washington state seal of biliteracy:

(a) Students must demonstrate proficiency in English by meeting the statewide minimum graduation requirements in English in compliance with RCW 28A.655.250; and

(b) Students must demonstrate proficiency in one or more world languages, which includes heritage and tribal languages, by one of the following:

(i) Demonstrating intermediate-mid level proficiency or higher on all components in the world language based on the American Council on the Teaching of Foreign Languages (ACTFL) proficiency guidelines, using a national or international assessment approved by the office of the superintendent of public instruction; or

(ii) Earning four competency-based credits according to the school district's policy and procedure for competency-based credits for world languages; or

(iii) Demonstrating proficiency in tribal or Native American languages; or

(iv) Demonstrating intermediate-mid proficiency in American Sign Language (ASL); or

(v) Passing an International Baccalaureate examination with a score of four or higher; or

(vi) Passing a world language Advanced Placement examination with a score of three or higher.

(2) Proficiency in tribal or Native American languages under subsection (1)(b)(iii) of this section is determined by the sovereign tribal government.

(a) Students of Native American languages spoken by Washington's 29 federally recognized tribes must be assessed by a first peoples' first language, culture, and oral traditions certified educator under WAC 181-78A-700 and 181-79A-140.

(b) For Native and tribal languages that are outside of Washington's 29 federally recognized tribes, consult the office of native education.