text: Passage of Lines
  Figure 16-2. Forward passage of lines
  PLANNING A FORWARD PASSAGE
  16-29. Planning considerations discussed in paragraphs 16-13 through 16-27 apply during forward passage
  of lines. Close coordination between the passing and stationary force is crucial to enable the successful
  execution of the forward passage and subsequent transfer of responsibility. The stationary force controls and
  secures the assigned area far enough to its front that the moving force can pass through the stationary force
  and reform into a combat formation before contact with an enemy force. Generally, passing units assume
  control of their respective assigned areas forward of the BHL after two-thirds of forward passing combat
  elements move through their passage points.
  PREPARING A FORWARD PASSAGE
  16-30. Passing units perform reconnaissance from their current locations to their designated assembly areas
  for the passage of lines. These assembly areas are generally located to the rear of stationary units. These
  passing units occupy their designated assembly areas after completing this reconnaissance. Commanders
  task-organize their passing units in those assembly areas for their subsequent missions before initiating their
  forward passages of lines. Units preparing for forward passages of lines avoid regrouping in their attack
  positions.
  EXECUTING A FORWARD PASSAGE
  16-31. Ideally, forward passing forces move in their desired movement formations as move through gaps
  in stationary unit positions without halting. This minimizes the time both forces are concentrated in forward
  areas and makes them less vulnerable to enemy attack. If not, they deploy to their desired movement
  formation as soon as they can.