4−5−2. FLIGHT DIRECTION
Clear aircraft at altitudes according to the
TBL 4−5−1.
4−5−3. EXCEPTIONS
When traffic, meteorological conditions, or aircraft
operational limitations prevent assignment of
altitudes prescribed in para 4−5−2, Flight Direction,
assign any cardinal altitude or flight level below
FL 410 or any odd cardinal flight level at or above
FL 410 without regard to direction of flight as
follows:
a. For traffic conditions, take this action only if
one of the following conditions exists:
1. Aircraft remain within a facility’s area and
prior approval is obtained from other affected
positions or sectors or the operations are covered in
a Facility Directive.
2. Aircraft will proceed beyond the facility’s
area and specific operations and procedures
permitting random altitude assignment are covered in
a letter of agreement between the appropriate
facilities.
b. Military aircraft are operating on random routes
and prior approval is obtained from the facility
concerned.
c. For meteorological conditions, take this action
only if you obtain prior approval from other affected
positions or sectors within your facility and, if
necessary, from the adjacent facility concerned.
d. For aircraft operational limitations, take this
action only if the pilot informs you the available
appropriate altitude exceeds the operational limitations
of his/her aircraft and only after you obtain prior
approval from other affected positions or sectors
within your facility and, if necessary, from the
adjacent facility concerned.
e. For mission requirements, take this action only
when the aircraft is operating on an MTR.
