I'm not familiar with Louisiana CCL laws so can't comment on the officers action.
As for the Mayor I think he cold have used a better choice of wording but technically he is more or less correct in his statements.
Oklahoma has this clause in the SDA
I suppose it would be up to the individual officers discretion of course if he is going to consider 65 in a 55 as a crime or not though.
This is intended to prevent random inspections, not to prevent securing the weapon for the duration of a contact.
It would not apply in the scenario offered here.
FYI, this was the opinion of the Oklahoma AG, not my own, when asked by a state senator for an official opinion.
Michael Brown