California pushed back in court Wednesday against a federal subpoena seeking state records tied to marijuana licenses and shipping manifests.

In a response filed in the U.S. District Court for the Southern District of California, lawyers with the attorney general's office said the U.S. Drug Enforcement Administration has not offered any required explanation for why its agents want documents about three unnamed marijuana businesses and three related individuals.

"Here, a facial reading of the subpoena reveals only that there is an ongoing investigation authorized under the Controlled Substances Act, nothing more," Senior Assistant Attorney General Harinder Kapur told the court. "This does not satisfy the relevancy requirement."

The case appears to be one of the first clashes between the state and federal agents over access to the thousands of license-related records submitted by legal California marijuana operators.

A DEA spokesman said the agency does not comment on pending litigation. A state Bureau of Cannabis Control spokesman declined to comment.

The DEA on July 20 asked the District Court to enforce the administrative subpoena the federal agency served on California marijuana regulators in January. The subpoena references a "criminal investigation" underway.

The BCC "has not complied with the subpoena and informed the United States multiple times that it will not produce the requested documents," Assistant U.S. Attorney Dylan Aste in San Diego wrote in the petition. "The United States has made all efforts to obtain compliance short of litigation, but the BCC refuses to comply with the subpoena."

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Attorneys for the state argued that federal agents haven't explained the relevancy of their records request to their investigation, nor have they shown that their subpoena is properly limited in scope.

Additionally, the BCC objected to the subpoena "because it failed to identify the relevancy of the requested information which 'is confidential, protected from disclosure, and part of pending licensing application investigations,'" all categories of documents shielded under state law, Kapur wrote.

Bureau records can contain sensitive information about license applicants, including their financial worth and criminal history.

In their original petition to the court, prosecutors argued that federal law requiring compliance with subpoenas for drug violation investigations supersedes state laws governing records protection and privacy.

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