(a) U.S. Operators. The base level of a U.S. operator is equal
to the number of owned or leased Stage 2 airplanes subject to §91.801(c)
of this subpart that were listed on that operator's operations
specifications for operations to or from airports in the contiguous United
States on any one day selected by the operator during the period January
1, 1990, through July 1, 1991, plus or minus adjustments made pursuant to
paragraphs (a) (1) and (2).
(1) The base level of a U.S. operator shall be increased by a number
equal to the total of the following --
(i) The number of Stage 2 airplanes returned to service in the United
States pursuant to §91.855(f);
(ii) The number of Stage 2 airplanes purchased pursuant to §91.855(g);
and
(iii) Any U.S. operator base level acquired with a Stage 2 airplane
transferred from another person under §91.863.
(2) The base level of a U.S. operator shall be decreased by the amount
of U.S. operator base level transferred with the corresponding number of
Stage 2 airplanes to another person under §91.863.
(b) Foreign air carriers. The base level of a foreign air carrier is
equal to the number of owned or leased Stage 2 airplanes that were listed
on that carrier's U.S. operations specifications on any one day during the
period January 1, 1990, through July 1, 1991, plus or minus any
adjustments to the base levels made pursuant to paragraphs (b) (1) and
(2).
(1) The base level of a foreign air carrier shall be increased by the
amount of foreign air carrier base level acquired with a Stage 2 airplane
from another person under §91.863.
(2) The base level of a foreign air carrier shall be decreased by the
amount of foreign air carrier base level transferred with a Stage 2
airplane to another person under §91.863.
(c) New entrants do not have a base level.