| http://www.w3.org/ns/prov#value | - That no carrier which served the notices of November 2, 1959, and no labor organizations which received such notices or served the labor organization notices of September 7, 1960, shall make any change except by agreement, or pursuant to an arbitration award as hereinafter provided, in rates of pay, rules, or working conditions encompassed by any of such notices, or engage in any strike or lockout
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