Wherever used in this subchapter, unless a different meaning clearly appears from the context:

(1) "Average annual volume of uncompleted abatement" means the volume in thousand board feet (MBF) or equivalent, representing the acres of untreated slash and the acres of treated slash not yet cleared by inspection or affidavit based upon a prior three-year rolling average, the first of which ends January 1, 2000.

(2) "Fire break" means the removal of all vegetative material to bare mineral soil.

(3) "Fuel break" means the removal of all down or dead woody material with a diameter of three inches or less.

(4) "General standard" means the level to which slash must be reduced such that a fire starting under conditions similar to a standard day, as defined by the department's HRA Manual, would burn with a flame length of four feet or less, as calculated by the fire science BEHAVE model, or other fire behavior model selected by the department.

(5) "MHRA" means a master fire hazard reduction agreement.

(6) "Slash" means the woody debris that is dropped to the forest floor during forest practices and consists of stems, branches, and twigs.

(7) "Special management area" or "SMA" means a situation in which the general hazard reduction standard is not required.