Regulations last checked for updates: Mar 12, 2025

Title 40 - Protection of Environment last revised: Feb 12, 2028
All TitlesTitle 40Chapter IPart 63Subpart DDAppendix - Table 2 to Subpart DD of Part 63—Applicability of Paragraphs in Subpart A of This Part 63—General Provisions to Subpart DD
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Appendix - Table 2 to Subpart DD of Part 63—Applicability of Paragraphs in Subpart A of This Part 63—General Provisions to Subpart DD
Subpart A reference Applies to Subpart DD Explanation
63.1(a)(1)Yes
63.1(a)(2)Yes
63.1(a)(3)Yes
63.1(a)(4)NoSubpart DD (this table) specifies applicability of each paragraph in subpart A to subpart DD.
63.1(a)(5)-63.1(a)(9)No
63.1(a)(10)Yes
63.1(a)(11)Yes
63.1(a)(12)Yes
63.1(b)(1)NoSubpart DD specifies its own applicability.
63.1(b)(2)NoReserved.
63.1(b)(3)No
63.1(c)(1)NoSubpart DD explicitly specifies requirements that apply.
63.1(c)(2)NoArea sources are not subject to subpart DD.
63.1(c)(3)NoReserved.
63.1(c)(4)NoReserved.
63.1(c)(5)YesExcept that sources are not required to submit notifications overridden by this table.
63.1(c)(6)Yes
63.1(d)No
63.1(e)No
63.2Yes§ 63.681 of subpart DD specifies that if the same term is defined in subparts A and DD, it shall have the meaning given in subpart DD.
63.3Yes
63.4(a)(1)-63.4(a)(2)Yes
63.4(a)(3)NoReserved.
63.4(a)(4)NoReserved.
63.4(a)(5)NoReserved.
63.4(b)Yes
63.4(c)Yes
63.5(a)(1)Yes
63.5(a)(2)Yes
63.5(b)(1)Yes
63.5(b)(2)NoReserved.
63.5(b)(3)Yes
63.5(b)(4)YesExcept the cross-reference to § 63.9(b) is changed to § 63.9(b)(4) and (5). Subpart DD overrides § 63.9(b)(2) and (b)(3).
63.5(b)(5)NoReserved.
63.5(b)(6)Yes
63.5(c)NoReserved.
63.5(d)(1)(i)Yes
63.5(d)(1)(ii)Yes
63.5(d)(1)(iii)Yes
63.5(d)(2)No
63.5(d)(3)Yes
63.5(d)(4)Yes
63.5(e)Yes
63.5(f)(1)Yes
63.5(f)(2)Yes
63.6(a)Yes
63.6(b)(1)NoSubpart DD specifies compliance dates for sources subject to subpart DD.
63.6(b)(2)No
63.6(b)(3)No
63.6(b)(4)No
63.6(b)(5)No§ 63.697 of subpart DD includes notification requirements.
63.6(b)(6)No
63.6(b)(7)No
63.6(c)(1)No§ 63.680 of subpart DD specifies the compliance date.
63.6(c)(2)-63.6(c)(4)No
63.6(c)(5)Yes
63.6(d)No
63.6(e)(1)(i)NoSee § 63.683(e) for general duty requirement.
63.6(e)(1)(ii)No
63.6(e)(1)(iii)Yes
63.6(e)(2)NoReserved.
63.6(e)(3)No
63.6(f)(1)No
63.6(f)(2)(i)Yes
63.6(f)(2)(ii)YesSubpart DD specifies the use of monitoring data in determining compliance with subpart DD.
63.6(f)(2)(iii) (A), (B), and (C)Yes
63.6(f)(2)(iii) (D)No
63.6(f)(2)(iv)Yes
63.6(f)(2)(v)Yes
63.6(f)(3)Yes
63.6(g)Yes
63.6(h)NoSubpart DD does not require opacity and visible emission standards.
63.6(i)YesExcept for § 63.6(i)(15), which is reserved.
63.6(j)Yes
63.7(a)(1)NoSubpart DD specifies required testing and compliance demonstration procedures.
63.7(a)(2)Yes
63.7(a)(3)Yes
63.7(a)(4)Yes
63.7(b)Yes
63.7(c)Yes
63.7(d)Yes
63.7(e)(1)NoSee § 63.694(l).
63.7(e)(2)Yes
63.7(e)(3)NoSubpart DD specifies test methods and procedures.
63.7(e)(4)Yes
63.7(f)Yes
63.7(g)Yes
63.7(h)(1)Yes
63.7(h)(2)Yes
63.7(h)(3)Yes
63.7(h)(4)No
63.7(h)(5)Yes
63.8(a)No
63.8(b)(1)Yes
63.8(b)(2)NoSubpart DD specifies locations to conduct monitoring.
63.8(b)(3)Yes
63.8(c)(1)(i)Yes
63.8(c)(1)(ii)Yes
63.8(c)(1)(iii)No
63.8(c)(2)Yes
63.8(c)(3)Yes
63.8(c)(4)NoSubpart DD specifies monitoring frequency
63.8(c)(5)-63.8(c)(8)No
63.8(d)No
63.8(e)No
63.8(f)(1)Yes
63.8(f)(2)Yes
63.8(f)(3)Yes
63.8(f)(4)(i)Yes
63.8(f)(4)(ii)Yes
63.8(f)(4)(iii)No
63.8(f)(5)(i)Yes
63.8(f)(5)(ii)No
63.8(f)(5)(iii)Yes
63.8(f)(6)Yes
63.8(g)Yes
63.9(a)Yes
63.9(b)(1)(i)Yes
63.9(b)(1)(ii)No
63.9(b)(2)Yes
63.9(b)(3)No
63.9(b)(4)Yes
63.9(b)(5)Yes
63.9(c)Yes
63.9(d)Yes
63.9(e)Yes
63.9(f)No
63.9(g)Yes
63.9(h)Yes
63.9(i)Yes
63.9(j)YesFor change in major source status only.
63.9(k)YesOnly as specified in § 63.9(j).
63.10(a)Yes
63.10(b)(1)Yes
63.10(b)(2)(i)No
63.10(b)(2)(ii)NoSee § 63.696(h) for recordkeeping of (1) date, time and duration; (2) listing of affected source or equipment, and an estimate of the volume of each regulated pollutant emitted over the standard; and (3) actions to minimize emissions and correct the failure.
63.10(b)(2)(iii)Yes
63.10(b)(2)(iv)No
63.10(b)(2)(v)No
63.10(b)(2)(vi)-(ix)Yes
63.10(b)(2)(x)-(xi)Yes
63.10(b)(2) (xii)-(xiv)No
63.10(b)(3)Yes
63.10(c)(1)-(6)No
63.10(c)(7)-(8)Yes
63.10(c)(9)-(15)No
63.10(d)(1)No
63.10(d)(2)Yes
63.10(d)(3)No
63.10(d)(4)Yes
63.10(d)(5)NoSee § 63.697(b)(3) for reporting of malfunctions.
63.10(e)(1)-63.10(e)(2)No
63.10(e)(3)Yes
63.10(e)(4)No
63.10(f)Yes
63.11-63.15Yes
63.16No

a Wherever subpart A specifies “postmark” dates, submittals may be sent by methods other than the U.S. Mail (e.g., by fax or courier). Submittals shall be sent by the specified dates, but a postmark is not required.

[64 FR 38983, July 20, 1999, as amended at 66 FR 1267, Jan. 8, 2001; 80 FR 14280, Mar. 18, 2015; 85 FR 73893, Nov. 19, 2020]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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