Part 91 operators are issued LOA to operate in Reduced Vertical Separation Minimum (RVSM), Performance Based Navigation (PBN), Single Long Range Navigation System (LRNS), and High Level Airspace (HLA). To be issued an LOA, operators develop and submit to the Federal Aviation Administration (FAA) manuals to support the procedures you will follow, including a requirement for training crews. This module complies with the International Standard for Business Aircraft Operations (IS-BAO) training requirement for "International Operations" defined in Chapter 8 of IS-BAO. The Business Aviation Safety Consortium (BASC) standard requires training when LOAs are issued for international operations.