To amend the National Labor Relations Act and the Railway Labor Act to prevent discrimination based on participation in labor disputes.

Amends the National Labor Relations Act and the Railway Labor Act to prohibit employer discrimination, during and at the conclusion of labor disputes, against employees who participate in such disputes. Prohibits employers from offering: (1) permanent replacement status to individuals who replace strikers or otherwise work or express a willingness to work during such disputes; or (2) certain employment preferences to such individuals over striking workers who have returned or have made unconditional offers to return to work.