In order to keep pace with a new and vital industry, the original provisions have been and are being constantly reviewed. For instance,
a second part to Annex 6, dealing exclusively with international general aviation, became applicable in September 1969. Similarly,
a third part to Annex 6, dealing with all international helicopter operations, became applicable in November 1986. Part III originally
addressed only helicopter flight recorders, but an amendment completing the coverage of helicopter operations in the same
comprehensive manner as aeroplane operations covered in Parts I and II was adopted for applicability in November 1990