48 CFR §47.304-5

1. (a)Unusual conditions or circumstances may require the use of terms other than f.o.b. origin or f.o.b. destination. Such conditions or circumstances include, but are not limited to—
   1. (1)Transportation disabilities at origin or destination;
   2. (2)Mode of transportation required;
   3. (3)Availability of Government or commercial loading, unloading, or transshipment facilities;
   4. (4)Characteristics of the supplies;
   5. (5)Trade customs related to certain supplies;
   6. (6)Origins or destinations in Alaska and Hawaii; and
   7. (7)Program requirements.
2. (b)Contracting officers shall obtain assistance from transportation officers before issuing solicitations when unusual conditions or circumstances exist that relate to f.o.b. terms.