(1) Each owner or operator of a MSW landfill that received solid waste after January 1, 1992, must submit an initial waste in place report to the department in accordance with WAC 173-408-170(1).

(2) Each owner or operator of an active MSW landfill having fewer than 450,000 tons of waste in place must submit an annual waste in place report to the department and local authority in accordance with WAC 173-408-170 (3) and (4) until either:

(a) The active MSW landfill reaches a size of greater than or equal to 450,000 tons of waste in place; or

(b) The owner or operator submits a closure notification under WAC 173-408-170(8).