Sacramento, California - A campaign to close the slavery loophole in California on Tuesday announced a series of endorsements from prominent labor organizations.

The Yes on Prop 6 campaign has received the backing of the California Labor Federation, California Professional Firefighters, California Teachers Association, SEIU California, UFCW Western States, UAW Region 6, and Labor Council for Latin American Advancement Sacramento Chapter.

The Prop 6 ballot measure, which will go before voters in November, would remove language from the California state constitution allowing involuntary servitude in cases of criminal punishment – a phenomenon many advocates and targeted communities have described as a direct continuation of chattel enslavement.

The proposal was one of the 14 priority bills included in the California Legislative Black Caucus' initial reparations package, developed following the release of the California Reparations Task Force's final report.

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"California Professional Firefighters strongly support Proposition 6, recognizing the profound need for prioritizing rehabilitation during time served over further punishment," California Professional Firefighters President Brian K. Rice said in a press release.

"We believe the incarcerated should be focused on rehabilitative, voluntary work, and educational programs that truly prepare them for successful re-entry into society," he continued.

"We urge Californians to end involuntary servitude by voting Yes on 6."