(a) Each railroad's program shall state which of the two types of service (conductor and passenger conductor), provided for in paragraph (b) of this section, that it will cover.

(b) A railroad may issue certificates for either of the following types of service:

(1) Conductor; and

(2) Passenger conductor.

(c) A railroad shall not reclassify the certification of any type of certified conductor to a different type of conductor certification during the period in which the certification is otherwise valid except when a conductor completes the emergency training identified in part 239 of this chapter and is certified as a passenger conductor.

(d) Each railroad is authorized to impose additional conditions or operational restrictions on the service a conductor may perform beyond those identified in this section provided those conditions or restrictions are not inconsistent with this part.