The FAR contains, sort of speaking, general rules issued by the administrator to all operators. Some operators would need, due to the type of acft, routes, revenue payload etc., an individual specification, to enhance their performance. As a result the OPSPECS will find some discrepancies with the FAR's. Its understandable.
In the 90's some charter operators would fly an american registered plane, between to different airports abroad, back and forth with the dispatcher on board. In these, middle of nowhere situation would stick to the FAR. Since many charters leased those planes for a while only. 707s, DC-8s, and lots of 727s.
I was wondering about a question i made today regarding a letter i got from the FAA about a new license, since mine was issued DEC 1990. Anyone in the same situation?