This is the key phrase of that letter."Exercise discretion accordingly" You may still get fined, or charged, depending on the CO or how he feels that day.
Discretion- the power or right to decide or act according to one's own judgment;
In the criminal justice system, police, prosecutors, judges, and the jury are often able to exercise a degree of discretion in deciding who will be subject to criminal penalties and how they will be punished. For example, the police officer may decide whom to formally arrest for an offense. For a traffic violation, a police officer may simply issue a warning.
Taken from this site.
http://en.wikipedia.org/wiki/Discretion