Legal Question in Family Law in California

First off, Montenegro does not prohibit a change to anything about custody and support. It only requires a showing of changed circumstances once a final custody order is in place (as opposed to temporary orders which can be changed on a showing of "best interests of the minor child." Second, Montenegro only applies to custodial time, not support, because (third) changes to support always require a showing of changed circumstances. All that said, even with no change in custodial time, when financial circumstances of one or both parents changes, such that a recalculation of support with the new financial figures would produce a meaningful change in the support owed, either parent can go in and ask that the support be modified.