(1) Except as provided in subsection (2) of this section, for purposes of the taxes imposed under this chapter on the sale of parts to the manufacturer of a commercial airplane, the sale is deemed to take place at the site of the final testing or inspection under federal aviation regulation part 21, subpart F or G.
(2) This section does not apply to:
(a) Sales of a standard part, such as a nut or bolt, manufactured in compliance with a government or established industry specification;
(b) Sales of a product produced under a technical standard order authorization or letter of technical standard order design approval pursuant to federal aviation regulation part 21, subpart O; or
(c) Sales of parts in respect to which final testing or inspection under federal aviation regulation part 21, subpart F or G takes place in this state.
(3) "Commercial airplane" has the same meaning given in RCW
82.32.550.