Fixed Units release criteria

[Cashew]

From the PzC manual:

Fixed Units


It is common in the game for certain units to begin
the scenario Fixed.  Depending on the game title
and scenario, some units may become Fixed after
the scenario starts.  The purpose behind having
Fixed units is to prevent unrealistic movement by
those units at the start of the scenario or to force a
player to halt movement as per historical
conditions that could occur at night.  Units that are
assaulted or Spotted automatically become un-Fixed.  In addition, depending
on the scenario, certain organizations may have Releases assigned to them
that will cause their units to become un-Fixed at a certain time in the scenario.
Depending on the Release, if any unit in such an organization becomes
Spotted, then the Release may be automatically triggered.

In the menu bar, under "Units" is "Releases" which shows you the time for scheduled ones. From the Help file:

The Release Dialog displays a list of the Fixed unit releases in the current
scenario.  Each release shows a time, date, probability that the release will
occur on that time and date, and the organization the release applies to.  When
the probability is followed by the letter T, it indicates that the release can also
be triggered whenever a unit in the specified organization becomes Spotted. 
When an asterisk (*) precedes the release, it indicates that the release did not
occur on the time and date specified.  Selecting an entry in the list of Releases
will Highlight the affected units on the map.  Double clicking an entry or clicking
OK will close the dialog and leave the units Highlighted.  Clicking Cancel will
close the dialog and remove the Highlighting.

Hopefully that helps; I'm new so maybe there's better info that I'm unaware of. And maybe someone could explain why the information is split between two files? Thank goodness for searchable PDFs otherwise I'd never find some of this stuff.