...the sanitary authorities of the States, Territories and municipalities, where the State, Territorial or municipal' health authorities will undertake to execute and enforce them; but if the State, Territorial or municipal authorities shall fail or refuse to enforce said rules and regulations, the...

...Treasury "may make additional rules and requirement*, — may strengthen the State quarantine, — and "if the State or municipal authorities shall fail or refuse to enforce SUCH RULES AND REGULATIONS, the President shall execute and enforce them, * * * and may detail or appoint...