900. Unless the provision or context otherwise requires, the definitions in this chapter govern the construction of this part. 902. "Debt" means an obligation incurred by a married person before or during marriage, whether based on contract, tort, or otherwise. 903. A debt is "incurred" at the following time: (a) In the case of a contract, at the time the contract is made. (b) In the case of a tort, at the time the tort occurs. (c) In other cases, at the time the obligation arises.