MEXICO CITY (AP) — Mexico’s President Andrés Manuel López Obrador has tossed another hot potato to U.S. President-elect Joe Biden with a proposal that would restrict U.S. agents in Mexico and remove their diplomatic immunity.

The proposal submitted quietly this week by López Obrador would require Drug Enforcement Administration agents to hand over all information they collect to the Mexican government and require any Mexican officials they contact to submit a full report to Mexico’s Foreign Relations Department.

“The proposal is that foreign agents will not have any immunity,” according to a summary of the president’s proposal to the Mexican Senate published Friday. In most countries, the chief DEA agent in the country often has full diplomatic immunity and other agents have some form of limited or technical immunity.

“The proposal requires that foreign agents give Mexican authorities the information they gather,” according to the proposed changes.

Mike Vigil, the DEA’s former chief of international operations, said of the handover of all information, “That is not going to happen.”

“Sadly, there is endemic corruption within the (Mexican) government. It’s going to be leaked, it’s going to compromise agents, it’s going to compromise informants,” Vigil said.

The history of leaks is well documented. In 2017, the commander of a Mexican police intelligence-sharing unit that received DEA information was charged with passing the DEA data to the Beltran Leyva drug cartel in exchange for millions of dollars.

The proposed changes also specify that any Mexican public servant — state, federal or local — who has as much as a phone call or text message from a U.S. agent would be required “to deliver a written report to the Foreign Relations Department and the Public Safety Department within three days.”

“It’s just going to make a burdensome system,” Vigil said, adding, “It is going to hinder bilateral operations, it is going to hinder bilateral exchange of information. This is going to be much more detrimental to Mexico than to the United States.”

“Ninety percent of the information sharing goes from the DEA to Mexico, rather from Mexico to the US. The vast majority of counter-drug successes in Mexico comes from DEA information,” he said.

The proposal appears to reflect Mexico’s anger about the arrest of former Mexican Defense Secretary Salvador Cienfuegos in Los Angeles in October.

Under the pressure of Mexico’s implicit threats to restrict or expel U.S. agents, U.S. prosecutors folded, dropping their case so Cienfuegos could be returned to Mexico and investigated — though he has not so far been charged —under Mexican law.

Acting U.S. Attorney Seth DuCharme told a judge at the time, “The United States determined that the broader interest in maintaining that relationship in a cooperative way outweighed the department’s interest and the public’s interest in pursuing this particular case.”

But despite that victory, this week’s proposed changes indicate Mexico isn’t willing to let the matter rest.

Cienfuegos, a general who led Mexico’s army department for six years under then-President Enrique Peña Nieto, was the highest-ranking former Mexican Cabinet official arrested since top security official Genaro Garcia Luna was arrested in Texas in 2019.

Cienfuegos was secretly indicted by a federal grand jury in New York in 2019. He was accused of conspiring with the H-2 cartel in Mexico to smuggle thousands of kilos of cocaine, heroin, methamphetamine and marijuana while he was defense secretary from 2012 to 2018.

Prosecutors said intercepted messages showed that Cienfuegos accepted bribes in exchange for ensuring the military did not take action against the cartel and that operations were initiated against its rivals. He was also accused of introducing cartel leaders to other corrupt Mexican officials.

The Mexican attorney general’s office has pledged to look at the evidence, but Cienfuegos was immediately released upon his arrival back in Mexico. Given the Army’s enormous political and social influence in Mexico, few expect him ever to be convicted there.

The Mexican government was angry it had not been informed of the investigation into Cienfuegos. But Vigil said that “had we notified them, Cienfuegos would have known within five minutes that there was a U.S. indictment against him.”

López Obrador’s administration has had surprisingly warm and cordial relations with President Donald Trump, but has not yet contacted Biden to congratulate him on his election victory.

López Obrador — who himself spent years disputing two earlier presidential losses — has said he wants to wait until “the electoral process” in the United States is finished.

In November, Foreign Relations Secretary Marcelo Ebrard raised eyebrows in the U.S. when he said that “whoever is culpable according to our laws will be tried, judged and if applicable sentenced in Mexico, and not in other countries.” Mexican officials later said that would not affect extraditions.