# 52.2304 Visibility protection.
(a) *Reasonably Attributable Visibility Impairment.* The requirements of section 169A of the Clean Air Act are not met because the plan does not include fully approvable measures for meeting the requirements of 40 CFR 51.305 for protection of visibility in mandatory Class I Federal areas.
(b) [Reserved]
(c) *Regional Haze.* The requirements of section 169A of the Clean Air Act are not met because the regional haze plan submitted by Texas on March 31, 2009, does not include fully approvable measures for meeting the requirements of 40 CFR 51.308(d)(3) and 51.308(e) with respect to emissions of NO<sub>X</sub> and SO<sub>2</sub> from electric generating units. EPA has given limited disapproval to the plan provisions addressing these requirements.
(d) Portions of SIPs addressing noninterference with measures required to protect visibility in any other state are disapproved for the 1997 PM<sub>2.5</sub>, 2006 PM<sub>2.5</sub>, 1997 ozone, 2008 ozone, 2010 NO<sub>2</sub>, 2010 SO<sub>2</sub>, 2012 PM<sub>2.5</sub>, and 2015 ozone NAAQS.
(e) [Reserved]
(f) *Measures addressing disapproval associated with NO*<sub>X</sub> *and SO*<sub>2</sub>. (1) The deficiencies associated with NO<sub>X</sub> identified in EPA's limited disapproval of the regional haze plan submitted by Texas on March 31, 2009, and EPA's disapprovals in paragraph (d) of this section, are satisfied by § 52.2283(d).
(2) The deficiencies associated with SO<sub>2</sub> identified in EPA's limited disapproval of the regional haze plan submitted by Texas on March 31, 2009, and EPA's disapprovals in paragraph (d of this section), are satisfied by § 52.2312.
[50 FR 28553, July 12, 1985, as amended at 52 FR 45137, Nov. 24, 1987; 54 FR 7770, Feb. 23, 1989; 77 FR 33658, June 7, 2012; 81 FR 352, Jan. 5, 2016; 82 FR 3129, Jan. 10, 2017; 82 FR 48363, Oct. 17, 2017; 86 FR 16533, Mar. 30, 2021; 90 FR 56009, Dec. 5, 2025]