; and (4) describes any plans that would allow for the use of alternative inspection sites near a port of entry along the Southern Border. (b) Classification The report submitted pursuant to subsection (a), or any part of such report, may be classified or provided with other appropriate safeguards to prevent public dissemination. 7. Minimum mandatory southbound inspection requirement (a) Requirement The Secretary of Homeland Security shall ensure that 20 percent of all vehicles traveling from the United States to Mexico are inspected before leaving the United States, to the extent practicable. (b) Authorized inspection activities Inspections required pursuant to subsection (a) may include nonintrusive imaging, physical inspections by officers or canine units, or other means authorized by the Secretary of Homeland Security. (c) Report Not later than 6 months after the date of the enactment of this Act, the Secretary of Homeland Security shall submit a report to the appropriate congressional committees that describes the staffing model that will be used to carry out the inspection requirement described in subsection (a). 8. Southbound currency and firearms seizures quarterly report (a) In general Not later than 90 days after the date of the enactment of this Act, and every 90 days thereafter until the date that is 4 years after such date of enactment, the Commissioner of U.S. Customs and Border Protection shall submit a report to the appropriate congressional committees that describes the seizure of currency, firearms, and ammunition attempted to be trafficked from the United States to Mexico across the Southern Border. (b) Contents Each report submitted pursuant to subsection (a) shall include, for the most recent 90-day period for which such information is available— (1) the total number of currency seizures that occurred from outbound inspections at United States land ports of entry along the Southern Border; (2) the total dollar amount associated with the currency seizures referred to in paragraph (1)