An aide to Rep. Kevin McCarthy (R-Calif.) was reprimanded by Golden State election regulators for not disclosing consulting fees used to pay for voter guides issued by a local Republican party affiliate.

In an Aug. 11 letter, California’s Fair Political Practices Commission warned Vincent Fong, McCarthy’s district director, for failing to disclose during the past three election cycles “required information regarding payments made to Western Pacific Research— on behalf of the Kern County Young Republicans Voting Guide.

Fong was the organization’s treasurer. The lawmaker’s re-election campaign was not named in the letter.

According to California law, certain political committees are required to disclose all payments of $100 or more, as well as the names and addresses of individuals or organizations paid with campaign money.

McCarthy’s office did not respond to a request for comment.