135.215 IFR: Operating limitations.
(a) Except as provided in paragraphs (b), (c) and (d) of this section, no
person may operate an aircraft under IFR outside of controlled airspace or
at any airport that does not have an approved standard instrument approach
procedure.
(b) The Administrator may issue operations specifications to the
certificate holder to allow it to operate under IFR over routes outside
controlled airspace if—
(1) The certificate holder shows the Administrator that the flight crew
is able to navigate, without visual reference to the ground, over an
intended track without deviating more than 5 degrees or 5 miles, whichever
is less, from that track; and
(2) The Administrator determines that the proposed operations can be
conducted safely.
(c) A person may operate an aircraft under IFR outside of controlled
airspace if the certificate holder has been approved for the operations and
that operation is necessary to—
(1) Conduct an instrument approach to an airport for which there is in
use a current approved standard or special instrument approach procedure; or
(2) Climb into controlled airspace during an approved missed approach
procedure; or
(3) Make an IFR departure from an airport having an approved instrument
approach procedure.
(d) The Administrator may issue operations specifications to the
certificate holder to allow it to depart at an airport that does not have an
approved standard instrument approach procedure when the Administrator
determines that it is necessary to make an IFR departure from that airport
and that the proposed operations can be conducted safely. The approval to
operate at that airport does not include an approval to make an IFR approach
to that airport.