Wash. Rev. Code § 25.10.911
(1) Before July 1, 2010, this chapter governs only:
(3) With respect to a limited partnership formed before January 1, 2010, the following rules apply except as the partners otherwise elect in the manner provided in the partnership agreement or by law for amending the partnership agreement:
(4) With respect to a limited partnership that elects pursuant to subsection (1)(b) of this section to be subject to this chapter, after the election takes effect the provisions of this chapter relating to the liability of the limited partnership's general partners to third parties apply:
(a) Before July 1, 2010, to:
[ 2009 c 188 s 1306.]