(1) The attorney general shall make any requests for additional information from the parties under RCW 19.86.110 within thirty days of the date notice is received under RCW 19.390.030 and 19.390.040.
(2) If the attorney general requests additional information pursuant to subsection (1) of this section, the transaction between the parties subject to the request may not proceed until 30 days after the parties have certified they are in substantial compliance with the attorney general's request. Any subsequent requests for additional information from the attorney general shall not extend the 30-day waiting period for the parties to close the transaction.
(3) Nothing in this section precludes the attorney general from conducting an investigation or enforcing state or federal antitrust laws at a later date.