21082.3.
(a) Prior to the adoption of a regional transportation plan pursuant to Section 65080 of the Government Code for a region in which a residential or mixed-use residential project is located, a lead agency may use a threshold of significance for greenhouse gas emissions adopted for the residential or mixed-use residential project by the air pollution control district or air quality management district within which the project is located to determine whether the project may have a significant effect on the environment due to the emission of greenhouse gases.(b) For a project subject to this section, greenhouse gas emissions below the threshold of significance do not have a significant effect on the environment as it relates to greenhouse gas emissions for the purposes of this division.
(c) For the purposes of this section, a “residential or mixed-use residential project” has the same meaning as set forth in subdivision (d) of Section 21159.28.