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TALLAHASSEE (CBSMiami/NSF) – A Miami-Dade County has asked the state’s highest court to take up a dispute between it and the County Police Benevolent Association which says the county committed an unfair labor practice.

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In February, the 1st District Court of Appeal ruled in favor of the union, and the county filed a notice last Friday asking the Supreme Court to consider the issue.

The case focuses on a 2012 decision by Mayor Carlos Gimenez to veto an agreement that had been approved by the county commission to resolve an impasse with the union.

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But a three-judge panel of the 1st District Court of Appeal backed the union’s argument that state law did not allow the mayor to veto the county commission’s resolution of the impasse. Gimenez wanted union members to make additional contributions to health-care costs.

The appeals court last month decline to rehear the case.

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The News Service of Florida contributed to this report.