(1) The responsible official shall carry out duties and functions for the purpose of assuring PLIA's compliance with SEPA and the SEPA rules.

(2) When PLIA is the lead agency, the responsible official shall review the environmental checklist and make the threshold determination in compliance with this chapter, chapters 43.21C RCW and 197-11 WAC, and specifically, WAC 197-11-330.

(3) The responsible official shall carry out further SEPA compliance under WAC 197-11-340, 197-11-350, or 197-11-360, as appropriate. This includes notice and circulation requirements for threshold determinations.