They aim to restrict concealed carry to those 21 and older; require applicants to disclose all prior arrests, criminal convictions and restraining or protective orders; require in-person interviews with the applicant and at least three character references; and allow sheriffs and police chiefs to consider applicants’ public statements as they weigh if the individual is dangerous.
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Stanislaus County, where I came from, was a shall-issue county and while I never heard of anybody that was lawfully allowed to own guns having their permit denied, they still had to jump through most all those hoops to get a permit, including the interview with the sheriff's department.
I don't recall hearing about having to provide references though.