c. Security. (1) The regimental munitions offi- cer is responsible for safeguarding the regimental ammunition supply point. He uses any means that are available within the installation; if the need for added security means is indicated, he makes specific recommendations to the regimental S-4.
(2) The battalion S-4 is charged with safeguard- ing the battalion ammunition supply point. He uses personnel from the battalion ammunition and pio- neer platoon for this purpose.
(3) Measures taken for the security of ammuni- tion supply points are similar to those taken for the regimental train bivouac area. (See par. 57e.)
d. Route of ammunition advance. During offen- sive action, regimental and battalion ammunition supply points are advanced by bounds along prede- termined routes whenever displacement becomes necessary in order to provide continuous close sup- port to units of the attacking echelon. This prede- termined route is called the route of ammunition advanceand is prescribed in all offensive situations. It starts with the initial location for the ammunition supply point and continues to include a probable location from which to serve troops on the finsj objective. Its purpose is to insure that units of the attacking echelon, which send back for ammunition, will not fail to locate the supply point even though it may be in the process of displacing.