CA Fam Code Section 5700.301

(a)

Except as otherwise provided in this part, this chapter applies to all proceedings under this part.

(b)

An individual petitioner or a support enforcement agency may initiate a proceeding authorized under this part by filing a petition in an initiating tribunal for forwarding to a responding tribunal or by filing a petition or a comparable pleading directly in a tribunal of another state or a foreign country which has or can obtain personal jurisdiction over the respondent.