Child add-on costs: reimbursement or payment of remainder (30 days, if order sets no period)

(b) Unless there has been an assignment of rights pursuant to Section 11477 of the Welfare and Institutions Code, when either parent accrues or pays costs pursuant to an order under this section, that parent shall provide the other parent with an itemized statement of the costs within a reasonable time, but not more than 90 days after accruing the costs. ... (3) The other parent shall make the reimbursement or pay the remaining costs within the time period specified by the court, or, if no period is specified, within a reasonable time not to exceed 30 days from notification of the amount due, or according to any payment schedule set by the health care provider for either parent unless the parties agree in writing to another payment schedule or the court finds good cause for setting another payment schedule.

CCP 12: "The time in which any act provided by law is to be done is computed by excluding the first day, and including the last, unless the last day is a holiday, and then it is also excluded." CCP 12a: "(a) If the last day for the performance of any act provided or required by law to be performed within a specified period of time is a holiday, then that period is hereby extended to and including the next day that is not a holiday. For purposes of this section, “holiday” means all day on Saturdays, all holidays specified in Section 135 and, to the extent provided in Section 12b, all days that by terms of Section 12b are required to be considered as holidays.(b) This section applies to Sections 659, 659a, and 921, and to all other provisions of law providing or requiring an act to be performed on a particular day or within a specified period of time, whether expressed in this or any other code or statute, ordinance, rule, or regulation." CCP 10: "Holidays within the meaning of this code are every Sunday and any other days that are specified or provided for as judicial holidays in Section 135." CRC 1.10(a): "The time in which any act provided by these rules is to be performed is computed by excluding the first day and including the last, unless the last day is a Saturday, Sunday, or other legal holiday, and then it is also excluded." CRC 1.10(b): "Unless otherwise provided by law, if the last day for the performance of any act that is required by these rules to be performed within a specific period of time falls on a Saturday, Sunday, or other legal holiday, the period is extended to and includes the next day that is not a holiday." Fam. Code 210: "Except to the extent that any other statute or rules adopted by the Judicial Council provide applicable rules, the rules of practice and procedure applicable to civil actions generally, including the provisions of Title 3a (commencing with Section 391) of Part 2 of the Code of Civil Procedure, apply to, and constitute the rules of practice and procedure in, proceedings under this code."