Franklin Roosevelt actually said...

In time of war, and at such other times as may be designated by the Surgeon General, all commissioned officers of the Public Health Service ...

The above-named officers shall, while under the jurisdiction of the War Department, serve under their commissions in the Coast and Geodetic ...

Public Health Service insignia shall be substituted for Army or Army Medical Corps insignia other than the block letters 'U. S.' and appropr...

Public Health Service insignia shall be substituted for SPAR insignia and headgear other than appropriate insignia of grade.