Pilots traditionally pay for the cost of endorsement training
The author needs to consult a dictionary. The use of the word tradition is totally incorrect in this instance, for something to be a tradition it needs to be over a generation, which ten years does not constitute.
Tradition
noun
the handing down of statements, beliefs, legends, customs, information, etc., from generation to generation, esp. by word of mouth or by practice: a story that has come down to us by popular tradition.
2. something that is handed down: the traditions of the Eskimos.
3. a long-established or inherited way of thinking or acting: The rebellious students wanted to break with tradition.
4. a continuing pattern of culture beliefs or practices.
5. a customary or characteristic method or manner: The winner took a victory lap in the usual track tradition.