"Obligation" means any established duty, regardless of whether the duty is a fixed duty, arising from:
1. An express or implied contractual relationship;
2. A relationship between a grantor and a grantee;
3. A relationship between a licensor and a licensee;
4. A fee-based or similar relationship;
5. A statute or regulation; or
6. The retention of any overpayment.
(Added to NRS by 2013, 1043)