CFR > Title 23 - Highways > CHAPTER III—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > PART 1340—UNIFORM CRITERIA FOR STATE OBSERVATIONAL SURVEYS OF SEAT BELT USE > SUBPART C—Administrative Requirements (§1340.10 to §1340.13) > 1340.11—Post-approval alterations to survey design.

1340.11—Post-approval alterations to survey design.

Code of Federal Regulations

Effective Date Note: At 76 FR 18056, Apr. 1, 2011, part 1340 was revised, effective May 2, 2011. For the convenience of the user, the revised text is set forth as follows: PART 1340—UNIFORM CRITERIA FOR STATE OBSERVATIONAL SURVEYS OF SEAT BELT USE § 1340.11 Post-approval alterations to survey design. After NHTSA approval of a survey design, States shall submit for NHTSA approval any proposed alteration to their survey design, including, but not limited to, sample design, seat belt use rate estimation method, variance estimation method and data collection protocols, at least three months before data collection begins.