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Code of Federal Regulations (Last Updated: March 29, 2019) |
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Title 40 - Protection of Environment |
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CHAPTER I — ENVIRONMENTAL PROTECTION AGENCY |
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SUBCHAPTER C — AIR PROGRAMS |
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Part 52 - APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS |
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Subpart B — Alabama |
§ 52.51 Classification of regions.
Latest version.
The Alabama plan was evaluated on the basis of the following classifications:
[37 FR 10847, May 31, 1972]
[37 FR 10847, May 31, 1972