Haw. Code R. § 11-60.1-202
As used in this subchapter:
"Carbon sink or carbon dioxide sink" means a carbon reservoir that removes a greenhouse gas or a precursor of a greenhouse gas or aerosol from the atmosphere, and is the opposite of a carbon source. The main sinks are the oceans and growing vegetation that absorb CO2.
"Facility-wide GHG emissions cap" means a permit emissions limitation, applicable to a covered source, limiting the entire source's annual non-biogenic greenhouse gas, and biogenic nitrous oxide and methane emissions. A facility-wide GHG emissions cap may also be defined in multiple covered source permits to identify partnering facilities with an approved combined GHG emissions cap as described in subparagraph 11-60.1-204(d)(6)(A).
"Municipal waste combustion operations" means a permitted covered source that combusts solid, liquid, or gasified household, commercial/retail, and/or institutional waste.
"On-the-Book" means control measures or operational practices affecting GHG emissions that the owner or operator of a facility plans, or is undertaking to implement because of regulatory or legal obligations; or as demonstrated through financial and resource commitments. Examples include required controls or practices mandated by a state or federal law; or budgeted and contracted/funded projects or resources.
"Permitted covered source" means a stationary source or facility issued or required to hold a covered source permit pursuant to this chapter, and has begun construction or operation by the effective date of this subchapter.
Haw. Code R. § 11-60.1-202