The Los Angeles City Council unanimously voted Friday to oppose the Trump administration's plan to re-examine the status of some national monuments.
In April, President Donald Trump ordered the Department of the Interior to review all designations of national monuments greater than 100,000 acres created since 1996.
Former Presidents Bill Clinton, George W. Bush and Barack Obama all used the Antiquities Act of 1906 to declare large swaths of land as national monuments, including when Obama declared the San Gabriel Mountains a national monument in 2014.
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"If the Trump administration is allowed to do what it wants, they will be drilling in the Grand Canyon and near woods and other of these monuments, so we should be strongly out there in opposition of this plan," City Councilman Paul Koetz said.
Trump's order suggested some of the monuments had been created without the proper amount of public input, and have also hurt the economy.
"Monument designations that result from a lack of public outreach and proper coordination with state, tribal and local officials and other relevant stakeholders may also create barriers to achieving energy independence, restrict public access to and use of federal lands, burden state, tribal and local governments, and otherwise curtail economic growth," Trump's executive order reads.
Despite Trump's order, he may not have the authority to reverse the declaration of a national monument.
"The Antiquities Act expressly authorizes the president to create a national monument, but it does not authorize a later president to revoke or modify a national monument," University of Richmond School of Law professor Carl Tobias told NPR.