How do NBA sign and trades work?

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Tags

1. #longer
2. #atomic
3. #signed
4. #trade
5. #protected
6. #under
7. #contractually
8. #contract
9. #voids
10. #acquiring
11. #player
12. #obligated
13. #being
14. #voided
15. #rules
16. #trades
17. #considered
18. #initial
19. #transactions