Pipeline and Hazardous Materials Safety Administration (PHMSA)
1,026,362Words in 29 parts
15.8Restriction density (per 1,000 words)
17.9Reading grade
71.7%Unchanged since 2017
7Flagged parts
2026-10-28Last change
Section changes per year
From the eCFR versioner, for the parts that the agency owns now. Before 2017 is the baseline load.
Text and size
- Sentences
- 32.7 words on average; 25.7% over 40 words; 42.5% passive; 13.8 cross-references per 1,000 words
- Sentence types
- definition 5.6% · prohibition 6.0% · paperwork 4.5% · obligation 36.9% · permission 8.8% · other 38.2%
- Checksum
83535d081c767a5bd956cb29a4390727d770ebd67bfa63823c890c9f10d9143a
Review candidates in this agency
| Rank | Part | Words | Score |
|---|---|---|---|
| 261 top 10% | 49 CFR 174
CARRIAGE BY RAIL
High signals: Directive share
+2.5 SD · Restriction density
+1.4 SD |
18,543 | 0.92 |
| 268 top 10% | 49 CFR 178
SPECIFICATIONS FOR PACKAGINGS
High signals: Size
+2.8 SD · Restriction density
+2.6 SD · Directive share
+1.7 SD |
161,960 | 0.91 |
| 278 top 10% | 49 CFR 179
SPECIFICATIONS FOR TANK CARS
High signals: Restriction density
+2.5 SD · Directive share
+2.3 SD · Size
+1.6 SD |
40,303 | 0.90 |
| 384 top 10% | 49 CFR 199
DRUG AND ALCOHOL TESTING
High signals: Restriction density
+2.0 SD · Directive share
+1.4 SD · Paperwork share
+1.1 SD |
9,116 | 0.83 |
| 424 top 10% | 49 CFR 192
TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS
High signals: Size
+2.5 SD · Directive share
+1.4 SD · Restriction density
+1.0 SD |
105,684 | 0.80 |
| 633 top 10% | 49 CFR 176
CARRIAGE BY VESSEL
High signals: Size
+1.6 SD · Directive share
+1.6 SD · Restriction density
+1.4 SD |
38,701 | 0.70 |
| 639 top 10% | 49 CFR 180
CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS
High signals: Size
+1.7 SD · Directive share
+1.6 SD · Restriction density
+1.5 SD |
42,213 | 0.70 |
| 726 | 49 CFR 173
SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS
High signals: Size
+3.1 SD · Directive share
+1.2 SD |
226,536 | 0.67 |
| 790 | 49 CFR 193
LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS
High signals: Directive share
+1.3 SD · Restriction density
+1.3 SD |
11,241 | 0.64 |
| 1,014 | 49 CFR 175
CARRIAGE BY AIRCRAFT
High signals: Directive share
+1.6 SD |
15,134 | 0.55 |
| 1,093 | 49 CFR 191
TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE; ANNUAL, INCIDENT, AND OTHER REPORTING
High signals: Paperwork share
+2.8 SD |
5,110 | 0.53 |
| 1,228 | 49 CFR 172
HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS
High signals: Size
+2.8 SD · Directive share
+1.1 SD |
160,084 | 0.49 |
| 1,305 | 49 CFR 195
TRANSPORTATION OF HAZARDOUS LIQUIDS BY PIPELINE
High signals: Size
+1.9 SD |
54,518 | 0.47 |
| 1,418 | 49 CFR 177
CARRIAGE BY PUBLIC HIGHWAY
High signals: Directive share
+1.2 SD · Restriction density
+1.2 SD |
16,388 | 0.43 |
| 1,591 | 49 CFR 107
HAZARDOUS MATERIALS PROGRAM PROCEDURES
High signals: Size
+1.6 SD |
38,527 | 0.39 |
| 1,616 | 49 CFR 194
RESPONSE PLANS FOR ONSHORE OIL PIPELINES
High signals: Reading grade
+1.6 SD |
6,546 | 0.38 |
| 2,457 | 49 CFR 130
OIL SPILL PREVENTION AND RESPONSE PLANS
High signals: none above 1 SD; ranked by the combined score |
5,366 | 0.16 |
| 3,468 | 49 CFR 109
DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIAL PROCEDURAL REGULATIONS
High signals: none above 1 SD; ranked by the combined score |
4,905 | -0.06 |
| 3,553 | 49 CFR 190
PIPELINE SAFETY ENFORCEMENT AND REGULATORY PROCEDURES
High signals: Size
+1.0 SD |
19,541 | -0.08 |
| 3,617 | 49 CFR 198
REGULATIONS FOR GRANTS TO AID STATE PIPELINE SAFETY PROGRAMS
High signals: none above 1 SD; ranked by the combined score |
2,599 | -0.10 |
| 4,393 | 49 CFR 196
PROTECTION OF UNDERGROUND PIPELINES FROM EXCAVATION ACTIVITY
High signals: none above 1 SD; ranked by the combined score |
1,083 | -0.28 |
| 4,885 | 49 CFR 171
GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS
High signals: Size
+1.5 SD |
33,566 | -0.41 |
| 5,220 | 49 CFR 105
HAZARDOUS MATERIALS PROGRAM DEFINITIONS AND GENERAL PROCEDURES
High signals: none above 1 SD; ranked by the combined score |
3,598 | -0.51 |
| 5,753 | 49 CFR 110
HAZARDOUS MATERIALS PUBLIC SECTOR TRAINING AND PLANNING GRANTS
High signals: none above 1 SD; ranked by the combined score |
1,604 | -0.70 |
| 5,926 | 49 CFR 106
RULEMAKING PROCEDURES
High signals: none above 1 SD; ranked by the combined score |
3,481 | -0.79 |
Score: the mean of six signals, in standard deviations (SD). Across the CFR, the top 641 of 6,402 ranked parts (10%) get a flag for review; this list shows 25. A flag is not a finding.
Statutes behind the most text
- 49 U.S.C. 5101: 805,543 words in 15 parts (78.5% of this agency's text)
- 49 U.S.C. 5103: 180,559 words in 4 parts (17.6% of this agency's text)
- 30 U.S.C. 185: 165,312 words in 3 parts (16.1% of this agency's text)
- 33 U.S.C. 1321: 81,977 words in 4 parts (8.0% of this agency's text)
- 28 U.S.C. 2461: 76,998 words in 3 parts (7.5% of this agency's text)
- 49 U.S.C. 60101: 23,223 words in 3 parts (2.3% of this agency's text)
- 33 U.S.C. 1231: 6,546 words in 1 parts (0.6% of this agency's text)
- 49 U.S.C. 5121: 5,110 words in 1 parts (0.5% of this agency's text)
From the authority notes. A citation is not proof that the statute requires the rule.
Largest parts
- 49 CFR 173: SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS (226,536 words)
- 49 CFR 178: SPECIFICATIONS FOR PACKAGINGS (161,960 words)
- 49 CFR 172: HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS (160,084 words)
- 49 CFR 192: TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS (105,684 words)
- 49 CFR 195: TRANSPORTATION OF HAZARDOUS LIQUIDS BY PIPELINE (54,518 words)
- 49 CFR 180: CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS (42,213 words)
- 49 CFR 179: SPECIFICATIONS FOR TANK CARS (40,303 words)
- 49 CFR 176: CARRIAGE BY VESSEL (38,701 words)
- 49 CFR 107: HAZARDOUS MATERIALS PROGRAM PROCEDURES (38,527 words)
- 49 CFR 171: GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS (33,566 words)
Reading grade and sentence types are approximate. Simple rules label each sentence; the first match wins.