---
kind: "section"
citation: "49 C.F.R. § 390.33"
title: "49"
number: "390.33"
heading: "Commercial motor vehicles used for purposes other than defined."
url: "https://uscodex.org/cfr/49/390.33"
---

# §390.33. Commercial motor vehicles used for purposes other than defined.


Whenever a commercial motor vehicle of one type is used to perform the functions normally performed by a commercial motor vehicle of another type, the requirements of this subchapter and [part 325](/cfr/49/part325.md) of subchapter A shall apply to the commercial motor vehicle and to its operation in the same manner as though the commercial motor vehicle were actually a commercial motor vehicle of the latter type. Example: If a commercial motor vehicle other than a bus is used to perform the functions normally performed by a bus, the regulations pertaining to buses and to the transportation of passengers shall apply to that commercial motor vehicle.


## Notes

### Amendments

[53 FR 18052, May 19, 1988, as amended at 60 FR 38744, July 28, 1995]

### Authority

Authority: 49 U.S.C. 113, 504, 508, 31132, 31133, 31134, 31136, 31137, 31144, 31149, 31151, 31502; sec. 114, Pub. L. 103-311, 108 Stat. 1673, 1677; secs. 212 and 217, Pub. L. 106-159, 113 Stat. 1748, 1766, 1767; sec. 229, Pub. L. 106-159 (as added and transferred by sec. 4115 and amended by secs. 4130-4132, Pub. L. 109-59, 119 Stat. 1144, 1726, 1743, 1744), 113 Stat. 1748, 1773; sec. 4136, Pub. L. 109-59, 119 Stat. 1144, 1745; secs. 32101(d) and 32934, Pub. L. 112-141, 126 Stat. 405, 778, 830; sec. 2, Pub. L. 113-125, 128 Stat. 1388; secs. 5403, 5518, and 5524, Pub. L. 114-94, 129 Stat. 1312, 1548, 1558, 1560; sec. 2, Pub. L. 115-105, 131 Stat. 2263; and 49 CFR 1.81, 1.81a, 1.87.

### Source

Source: 53 FR 18052, May 19, 1988, unless otherwise noted.

### Amendments

[53 FR 18052, May 19, 1988, as amended at 60 FR 38744, July 28, 1995]