CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES > SUBPART D—Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value (§81.400 to §81.437) > 81.429—Texas.

81.429—Texas.

Area name Acreage Public Law establishing Federal land manager
Big Bend NP 708,118 74-157 USDI-NPS
Guadalupe Mountains NP 76,292 89-667 USDI-NPS