Thank you for the info. Slowly, this old addled brain keeps learning new things. So you are not required to keep Class III weapons secured in a locked gun safe, transport in a locked container, and undergo periodic inspections by the ATF?No, you're mostly wrong. The closest you are to right is you must file a 5320.20 before transporting a machinegun across state lines. None of the other items on your list are regulated. BTW, it's not a permit. It's a tax stamp you purchase. It never expires and requires no renewal.