oEPA
United States
Environmental Protection
Agency
EPA-420-B-12-012
   February 2012
                         Transportation Conformity Rule Restructuring Amendments
                                           Comparison Table

This comparison table is intended to assist readers in understanding how the conformity rule has been amended per
the "Transportation Conformity Rule Restructuring Amendments" final rule (Docket # EPA-HQ-OAR-2009-0128).
Sections of the conformity rule that have been amended are included in the table below. Sections of the transportation
conformity rule that were not amended are not included in the table.

Until these rule amendments are published in the Code of Federal Regulations (CFR), readers should refer to the final
rule for current regulatory requirements.
Topic
Definitions
Consultation
General
Criteria and
Procedures
Conformity
Tests: Ozone
Previous
Conformity
Rule
Section
93.101
93.101
93.105(c)(1)(vi)
93.109(b)
93.109(c)
Description of Previous Provision
Under "NAAQS," paragraphs (1) through
(6) identified specific NAAQS: "1-hour
ozone NAAQS", "8-hour ozone NAAQS",
"24-hour PM10 NAAQS", "1997 PM2.5
NAAQS", "2006 PM2.5 NAAQS", and
"Annual PM10 NAAQS"
"Clean data" definition
Interagency consultation procedures:
Specific processes
Description of how 93.109 as a whole is
structured
1 -hour ozone areas
Updated
Provision
93.101
93.101
93.105(c)(1)(vi)
93.109(b)
N/A
Purpose of Amendment
Removes the definitions for specific
NAAQS; the conformity rule applies
to any ozone, CO, NO2, PM2sor
PM10 NAAQS
Updates definition, no substantive
change
Updates a reference; no other
changes made
Updated to reflect revised structure:
that paragraph (c) addresses the
use of budget test and/or interim
emissions test(s) and (d) addresses
the hot-spot test; other references
updated
Deletes this section as it is no
longer applicable. The 1-hour
ozone NAAQS has been revoked.

-------
Topic

Conformity
Tests: CO
Conformity
Tests: PM10
Previous
Conformity
Rule
Section
93.109(d)(1)
93.109(d)(2)
93.109(d)(3)
93.109(d)(4)
93.109(d)(5)
93.109(e)(1)
93.109(e) (2)
93.109(e) (3)
93.109(6) (4)
93.109(f)(1)
93.109(f)(2)
93.109(0(3)
93.109(0(4)
93.109(g)(1)
Description of Previous Provision
Use of 8-hour ozone budgets, once
adequate or approved
Use of interim emissions test(s) when no
ozone budgets
Use of interim emissions test(s) for NOx
when no NOx budget
Tests for areas not required to submit a
SI P for ozone areas
Clean data option for moderate and above
ozone areas
Use of 8-hour ozone budgets, once
adequate or approved
Use of 1-hour ozone budgets before area
has 8-hour ozone budgets
Use of interim emissions test(s) when no
ozone budgets
Clean data option for moderate and above
ozone areas
FHWA/FTA projects in CO areas requiring
a hot-spot analysis
Use of CO budgets, once approved or
adequate
Use of interim emissions tests when no
CO budget
Regional conformity tests in CO
nonattainment areas that don't have a
maintenance plan and not required to
submit an attainment demonstration
FHWA/FTA projects in PM10 areas
requiring a hot-spot analysis
Updated
Provision
93.109(c)(1)
93.109(c)(3)
93.109(c)(4)
93.109(c)(1), (c)(2),
(c)(3)
93.109(c)(5)
93.109(c)(1)
93.109(c)(2)
93.109(c)(3)
93.109(c)(5)
93.109(d)(1)
93.109(c)(1)
93.109(c)(3)
93.109(c)(1), (c)(2),
(c)(3)
93.109(d)(2)
Purpose of Amendment
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS
Expands clean data flexibility to any
NAAQS for which EPA has clean
data regulations or policies
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS
Expands clean data flexibility to any
NAAQS for which EPA has a clean
data regulation and/or policy
Redesignates paragraph (0(1) to
(d)(1)
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS
Redesignates paragraph (g)(1) to
(d)(2)

-------
Topic

Conformity
Tests: NO2
Conformity
Tests: PM2.5
Previous
Conformity
Rule
Section
93.109(g) (2)
93.109(g) (3)
93.109(g)(4)(i)
93.109(g)(4)(ii)
93.109(h)(1)
93.109(h)(2)
93.109(i)(1)
93.109(i)(2)
93.109(0(3)
93.109(j)(1)
93.109(j)(2)
93.109(j)(3)
93.109(k)(1)
93.109(k)(2)
93.109(k)(3)
Description of Previous Provision
Use of PM10 budgets, once approved or
adequate
Use of adequate or approved PM10
budget of another PM10 NAAQS
Use of interim emissions tests when the
area has no PM10 budget
Use of interim emissions tests if the
submitted PM 10 SIP is a demonstration of
impracticability under CAA 189(a)(1)(B)(ii)
and does not demonstrate attainment
Use of NO2 budgets, once approved or
adequate
Use of interim emissions tests when area
has no NO2 budget
FHWA/FTA projects in 1997 PM2.5 areas
requiring a hot-spot analysis
Use of 1997 PM2.5 budgets, once
approved or adequate
Use of interim emissions tests when area
has no PM2.5 budget
FHWA/FTA projects in 2006 PM2.5
requiring a hot-spot analysis
Use of 2006 PM2.5 budgets, once
approved or adequate
Use of interim emissions test
FHWA/FTA projects in 2006 PM2.5
requiring a hot-spot analysis
Use of 2006 PM2.5 budgets, once
approved or adequate
Use of 1997 PM2.5 budgets / interim
emission test
Updated
Provision
93.109(c)(1)
93.109(c)(2)
93.109(c)(3)
93.109(c)(6)
93.109(c)(1)
93.109(c)(3)
93.109(d)(3)
93.109(c)(1)
93.109(c)(3)
93.109(d)(3)
93.109(c)(1)
93.109(c)(3)
93.109(d)(3)
93.109(c)(1)
93.109(c)(3)
Purpose of Amendment
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS
Similar to previous rule provision
but eliminates redundant language
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS
Includes hot-spot conformity test
requirements for all PM2.5 areas
Addresses all NAAQS
Includes hot-spot conformity test
requirements for all PM2.s areas
Addresses all NAAQS
Includes hot-spot conformity test
requirements for all PM2.5 areas
Addresses the use of the budget
test and/or interim emissions test(s)
for all NAAQS

-------
Topic
Conformity
tests in ...
Hot-spot tests
in...
Budget test
Interim
Emissions
Tests
Non-federal
projects in...
Previous
Conformity
Rule
Section
93.109(1)
93.109(m)
93.109(n)
93.116(b)
93.118(a)
93.118(b)
93.119(a)
93.119(b)
93.119(c)
93.119(d)
93.119(e)
93.121(b)
Description of Previous Provision
Areas with limited maintenance plans
Areas with insignificant motor vehicle
emissions
Isolated rural nonattainment and
maintenance areas
CO areas without an approved attainment
or maintenance plan
Introductory paragraph for the budget test
Describes years for which consistency
with budgets must be demonstrated
Introductory paragraph for interim
emissions tests
Ozone areas
CO areas
PMIOand NO2 areas
PM2.5 areas
Isolated rural nonattainment and
maintenance areas
Updated
Provision
93.109(e)
93.109(f)
93.109(g)
93.116(b)
93.118(a)
93.118(b)
93.119(a)
93.119(b)
93.119(0)
93.119(d)
93.119(d)
93.121(b)
Purpose of Amendment
Redesignates paragraphs (l)(m)(n)
to (e)(f)(g); updates references in
paragraph (g)(2) and revises
reference in (g)(2)(iii)
Updates references; no other
changes made
Updates references; no other
changes made
Simplifies the provision by
referencing 93. 118(d)
Updates references; no other
changes made
Restructured so that the provision
applies to current and future
NAAQS without a rule revision
(specific baseline years removed
from these paragraphs and put into
§93.119(e))
Combines existing 93.119(d) and
(e) into (d).
Restructured so that the provision
applies to current and future
NAAQS without a rule revision
(specific baseline years removed
from these paragraphs and put into
§93.119(e))
Updates references; no other
changes made

-------
Topic

Previous
Conformity
Rule
Section
93.121(c)
Description of Previous Provision
Areas with limited maintenance plans and
areas with insignificant motor vehicle
emissions
Updated
Provision
93.121(0)
Purpose of Amendment
Updates references; no other
changes made

-------