Sw. Airlines Co. v. Local 555, Transp. Workers Union of Am. AFL-CIO

WIENER, Circuit Judge:

Plaintiff-Appellant Southwest Airlines Company ("Southwest") and Defendant-Appellee *840 Local 555, TWU AFL-CIO ("Local 555"), the union representative for Southwest's ramp, operations, provisioning, and freight agents, agreed to a new collective bargaining agreement ("CBA"). The new CBA was ratified by Local 555's membership on February 19, 2016 and signed by the parties on March 16, 2016. The CBA contains provisions (1) stating that it would become "effective" after Southwest accepted the agreement and the union ratified it and (2) requiring that grievances be filed within…