California Family Code Sections 900-903

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.