Put that together with Executive Orders for the past thirty or so years and America can be locked down tighter than a drum.

HR 347 pertains to government buildings or property where the president may be. However, that could be a town or city or anything so designated by government. The SS (interesting initials) is part of HS and Executive Orders already 'on the books:

""A Presidential Executive Order, whether Constitutional or not, becomes law simply by its publication in the Federal Registry." Congress can still attempt to block "by passing legislation in conflict with it" refusing to fund or enforce the law. Even with that the President has the power of the Veto. Congress can attempt to override the veto but that requires a two-thirds majority. Only two executive orders have ever been overturned.

Here are just a few Executive Orders that would suspend the Constitution and the Bill of Rights. These Executive Orders have been on record for nearly 30 years and could be enacted by the stroke of a Presidential pen:

EXECUTIVE ORDER 10990 allows the government to take over all modes of transportation and control of highways and seaports.
EXECUTIVE ORDER 10995 allows the government to seize and control the communication media.
EXECUTIVE ORDER 10997 allows the government to take over all electrical power, gas, petroleum, fuels and minerals.
EXECUTIVE ORDER 10998 allows the government to take over all food resources and farms.
EXECUTIVE ORDER 11000 allows the government to mobilize civilians into work brigades under government supervision.
EXECUTIVE ORDER 11001 allows the government to take over all health, education and welfare functions.
EXECUTIVE ORDER 11002 designates the Postmaster General to operate a national registration of all persons.
EXECUTIVE ORDER 11003 allows the government to take over all airports and aircraft, including commercial aircraft.
EXECUTIVE ORDER 11004 allows the Housing and Finance Authority to relocate communities, build new housing with public funds, designate areas to be abandoned, and establish new locations for populations.
EXECUTIVE ORDER 11005 allows the government to take over railroads, inland waterways and public storage facilities.
EXECUTIVE ORDER 11051 specifies the responsibility of the Office of Emergency Planning and gives authorization to put all Executive Orders into effect in times of increased international tensions and economic or financial crisis.
EXECUTIVE ORDER 11310 grants authority to the Department of Justice to enforce the plans set out in Executive Orders, to institute industrial support, to establish judicial and legislative liaison, to control all aliens, to operate penal and correctional institutions, and to advise and assist the President."