In National Federation of Federal Employees, Local 1309 v. Dept. of the Interior, the Supreme Court held that the Federa

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In National Federation of Federal Employees, Local 1309 v. Dept.
of the Interior, the Supreme Court held that the Federal Labor
Relations Authority had the power to determine whether federal
employers were required to engage in “midterm” bargaining. Midterm
bargaining is:
A. used to create a new collective agreement or to renew an
existing agreement.
B. the bargaining during the term of a collective agreement over
subjects that were not included in the agreement.
C. a process set up by a collective agreement to deal with
complaints that arise under the collective agreement.
D. an arbitration that defines the rights and obligations of
each party under the agreement.