Unless specifically defined in the Texas Clean Air Act or in §3.2 or §101.1 of this title (relating to Definitions), the terms used by the commission have the meanings commonly ascribed to them in the field of air pollution control. In addition, the following words and terms, when used in this division, have the following meanings, unless the context clearly indicates otherwise.
  (1) Adjustment period--A period of time, beginning on the first day of operation of a facility and ending no more than 180 consecutive days later, used to make corrections and adjustments to achieve normal technical operating characteristics of the facility.
  (2) Affected facility--A facility subject to §§117.310, 117.1210, or 117.2010 of this title (relating to Emission Specifications for Attainment Demonstration; and Emission Specifications) that is located at a site that is subject to this division.
  (3) Allowance--The authorization to emit one ton of nitrogen oxides, expressed in tenths of a ton, during a control period.
  (4) Authorized account representative--The responsible person who is authorized, in writing, to trade and otherwise manage allowances.
  (5) Broker--A person not required to participate in the requirements of this division who opens an account under this division for the purpose of banking and trading allowances.
  (6) Broker account--The account where allowances held by a broker are recorded. Allowances may not be used to satisfy compliance requirements for this division while held in a broker account.
  (7) Compliance account--The account where allowances held by the owner or operator of a site subject to this division are recorded for the purposes of meeting the requirements of this division for an affected facility at that site.
  (8) Control period--The 12-month period beginning January 1 and ending December 31 of each year. The initial control period began January 1, 2002.
  (9) Existing facility--A new or modified facility that either submitted an application for a permit under Chapter 116 of this title (relating to Control of Air Pollution by Permits for New Construction or Modification) that the executive director determined to be administratively complete before January 2, 2001, or qualified for a permit by rule under Chapter 106 of this title (relating to Permits by Rule) and commenced construction before January 2, 2001.
  (10) Houston-Galveston-Brazoria (HGB) ozone nonattainment area--An area consisting of Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller Counties.
  (11) Level of activity--The amount of activity at a facility measured in terms of production, fuel use, raw materials input, or other similar units.
  (12) Site--As defined in §122.10 of this title (relating to General Definitions).
  (13) Uncontrolled design capacity to emit--The maximum capacity of a facility to emit nitrogen oxides without consideration for post-combustion pollution control equipment, enforceable limitations, or operational limitations. The owner or operator of a stationary diesel engine may use the lower of 876 hours or a federally enforceable limitation on total hours of operation to calculate uncontrolled design capacity to emit if the engine would otherwise be exempt under §117.2003(a)(2)(I) of this title (relating to Exemptions) except that the engine does not meet the emission standard requirements of §117.2003(a)(2)(I)(ii) of this title.
  (14) Vintage allowance--An allowance that is not used for compliance during the control period in which it is allocated and remains available for use only in the control period following the one in which it was allocated.

Source Note: The provisions of this §101.350 adopted to be effective January 18, 2001, 26 TexReg 282; amended to be effective October 18, 2001, 26 TexReg 8073; amended to be effective January 17, 2003, 28 TexReg 83; amended to be effective August 16, 2007, 32 TexReg 4985; amended to be effective April 1, 2010, 35 TexReg 2574; amended to be effective June 25, 2015, 40 TexReg 3848