Every common carrier by railroad while engaging in commerce between any of the several States or Territories, or between any of the States and Territories, or between the District of Columbia and any of the States or Territories, or between the District of Columbia or any of the States or Territories and any foreign nation or nations, shall be liable in damages to any person suffering injury while he is employed by such carrier in such commerce, or, in case of the death of such employee, to his or her personal representative, for the benefit of the surviving widow or husband and children of such employee; and, if none, then of such employee's parents; and, if none, then of the next of kin dependent upon such employee, for such injury or death resulting in whole or in part from the negligence of any of the officers, agents, or employees of such carrier, or by reason of any defect or insufficiency, due to its negligence, in its cars, engines, appliances, machinery, track, roadbed, works, boats, wharves, or other equipment.

Any employee of a carrier, any part of whose duties as such employee shall be the furtherance of interstate or foreign commerce; or shall, in any way directly or closely and substantially, affect such commerce as above set forth shall, for the purposes of this chapter, be considered as being employed by such carrier in such commerce and shall be considered as entitled to the benefits of this chapter.

In all actions on and after April 22, 1908 brought against any such common carrier by railroad under or by virtue of any of the provisions of this chapter to recover damages for personal injuries to an employee, or where such injuries have resulted in his death, the fact that the employee may have been guilty of contributory negligence shall not bar a recovery, but the damages shall be diminished by the jury in proportion to the amount of negligence attributable to such employee: Provided, That no such employee who may be injured or killed shall be held to have been guilty of contributory negligence in any case where the violation by such common carrier of any statute enacted for the safety of employees contributed to the injury or death of such employee.

In any action brought against any common carrier under or by virtue of any of the provisions of this chapter to recover damages for injuries to, or the death of, any of its employees, such employee shall not be held to have assumed the risks of his employment in any case where such injury or death resulted in whole or in part from the negligence of any of the officers, agents, or employees of such carrier; and no employee shall be held to have assumed the risks of his employment in any case where the violation by such common carrier of any statute enacted for the safety of employees contributed to the injury or death of such employee.

A regulation, standard, or requirement in force, or prescribed by the Secretary of Transportation under chapter 201 of title 49 or by a State agency that is participating in investigative and surveillance activities under section 20105 of title 49, is deemed to be a statute under sections 53 and 54 of this title.

Any contract, rule, regulation, or device whatsoever, the purpose or intent of which shall be to enable any common carrier to exempt itself from any liability created by this chapter, shall to that extent be void: Provided, That in any action brought against any such common carrier under or by virtue of any of the provisions of this chapter, such common carrier may set off therein any sum it has contributed or paid to any insurance, relief benefit, or indemnity that may have been paid to the injured employee or the person entitled thereto on account of the injury or death for which said action was brought.

No action shall be maintained under this chapter unless commenced within three years from the day the cause of action accrued. Under this chapter an action may be brought in a district court of the United States, in the district of the residence of the defendant, or in which the cause of action arose, or in which the defendant shall be doing business at the time of commencing such action. The jurisdiction of the courts of the United States under this chapter shall be concurrent with that of the courts of the several States.

Any right of action given by this chapter to a person suffering injury shall survive to his or her personal representative, for the benefit of the surviving widow or husband and children of such employee, and, if none, then of such employee's parents; and, if none, then of the next of kin dependent upon such employee, but in such cases there shall be only one recovery for the same injury.

Any contract, rule, regulation, or device whatsoever, the purpose, intent, or effect of which shall be to prevent employees of any common carrier from furnishing voluntarily information to a person in interest as to the facts incident to the injury or death of any employee, shall be void, and whoever, by threat, intimidation, order, rule, contract, regulation, or device whatsoever, shall attempt to prevent any person from furnishing voluntarily such information to a person in interest, or whoever discharges or otherwise disciplines or attempts to discipline any employee for furnishing voluntarily such information to a person in interest, shall, upon conviction thereof, be punished by a fine of not more than $1,000 or imprisoned for not more than one year, or by both such fine and imprisonment, for each offense:

Provided, That nothing herein contained shall be construed to void any contract, rule, or regulation with respect to any information contained in the files of the carrier, or other privileged or confidential reports. If any provision of this chapter is declared unconstitutional or the applicability thereof to any person or circumstances is held invalid, the validity of the remainder of the chapter and the applicability of such provision to other persons and circumstances shall not be affected thereby.

(a) General. - Except as provided in subsection (c) of this section and section 20303 of this title, a railroad carrier may use or allow to be used on any of its railroad lines -

(1) a vehicle only if it is equipped with -

(A) couplers coupling automatically by impact, and capable of being uncoupled, without the necessity of individuals going between the ends of the vehicles;

(B) secure sill steps and efficient hand brakes; and

(C) secure ladders and running boards when required by the Secretary of Transportation, and, if ladders are required, secure handholds or grab irons on its roof at the top of each ladder;

(2) except as otherwise ordered by the Secretary, a vehicle only if it is equipped with secure grab irons or handholds on its ends and sides for greater security to individuals in coupling and uncoupling vehicles;

(3) a vehicle only if it complies with the standard height of drawbars required by regulations prescribed by the Secretary;

(4) a locomotive only if it is equipped with a power-driving wheel brake and appliances for operating the train-brake system; and

(5) a train only if -

(A) enough of the vehicles in the train are equipped with power or train brakes so that the engineer on the locomotive hauling the train can control the train's speed without the necessity of brake operators using the common hand brakes for that purpose; and

(B) at least 50 percent of the vehicles in the train are equipped with power or train brakes and the engineer is using the power or train brakes on those vehicles and on all other vehicles equipped with them that are associated with those vehicles in the train.

(b) Refusal To Receive Vehicles Not Properly Equipped. - A railroad carrier complying with subsection (a)(5)(A) of this section may refuse to receive from a railroad line of a connecting railroad carrier or a shipper a vehicle that is not equipped with power or train brakes that will work and readily interchange with the power or train brakes in use on the vehicles of the complying railroad carrier.

(c) Combined Vehicles Loading and Hauling Long Commodities. - Notwithstanding subsection (a)(1)(B) of this section, when vehicles are combined to load and haul long commodities, only one of the vehicles must have hand brakes during the loading and hauling.

(d) Authority To Change Requirements. - The Secretary may -

(1) change the number, dimensions, locations, and manner of application prescribed by the Secretary for safety appliances required by subsection (a)(1)(B) and (C) and (2) of this section only for good cause and after providing an opportunity for a full hearing;

(2) amend regulations for installing, inspecting, maintaining, and repairing power and train brakes only for the purpose of achieving safety; and

(3) increase, after an opportunity for a full hearing, the minimum percentage of vehicles in a train that are required by subsection (a)(5)(B) of this section to be equipped and used with power or train brakes.

(e) Services of Association of American Railroads. - In carrying out subsection (d)(2) and (3) of this section, the Secretary may use the services of the Association of American Railroads.

An employee of a railroad carrier injured by a vehicle or train used in violation of section 20302(a)(1)(A), (2), (4), or (5)(A) of this title does not assume the risk of injury resulting from the violation, even if the employee continues to be employed by the carrier after learning of the violation.

A railroad carrier may use or allow to be used a locomotive or tender on its railroad line only when the locomotive or tender and its parts and appurtenances -

(1) are in proper condition and safe to operate without unnecessary danger of personal injury;

(2) have been inspected as required under this chapter and regulations prescribed by the Secretary of Transportation under this chapter; and

(3) can withstand every test prescribed by the Secretary under this chapter.