Provides that where safety equipment or devices have been made available, and an employee has failed to follow safety instruction or safe work practices in accordance with training provided, or failed to utilize provided safety equipment or devices, or engaged in a criminal act or was impaired by the use of drugs or alcohol, and such failure, act or impairment is a proximate cause of an injury to such person, the conduct attributable to such person shall not bar recovery, but the amount of damages otherwise recoverable shall be determined in accordance with contributory negligence provisions.