(1) Retailers who unknowingly sell products prohibited under RCW 70A.405.020 or 70A.405.030 are not liable under this chapter.

(2) In-state retailers in possession of products on the date that restrictions on the sale of the products become effective under RCW 70A.405.020 or 70A.405.030 may exhaust their existing stock through sales to the public.

(3) The department must assist in-state retailers in identifying potential products containing PBDEs.

(4) If a retailer unknowingly possesses products that are prohibited for sale under RCW 70A.405.020 or 70A.405.030 and the manufacturer does not recall the products as required under RCW 70A.405.100(2), the retailer may exhaust its existing stock through sales to the public. However, no additional prohibited stock may be sold or offered for sale.