Short answer. Yes, if a separation of property was decreed and you have reconciled and resumed common life after at least one year apart. You file a motion in that same case for a decree reviving the former regime. Reconciling at home does not revive it by itself.
What the law says
(6) When the spouses who have separated in fact for at least one year, reconcile and resume common life;
Family Code, Article 141 — Reviving the Former Property Regime. Read the full provision →
Reconciliation is not enough on its own
The instances listed in the article are grounds for asking, not events that change the regime by themselves. If a court decreed a separation of property, that decree governs your property until another decree replaces it, no matter how completely the two of you have put the estrangement behind you. Couples who move back in together and resume joint finances often assume the old regime resumed with them. It did not, and the mistake surfaces at the worst moment — when a property is being sold, or when a creditor asks which patrimony answers for a debt.
Two facts have to be true
The ground has an ingredient people overlook. The spouses must have separated in fact for at least one year, and they must reconcile and resume common life. Both halves are factual and both have to be shown. A brief estrangement of a few months does not fit this instance, and a reconciliation that is emotional but has not produced a resumption of common life does not either. A related but different instance covers the spouse who left the conjugal home without a decree of legal separation and later resumes common life, so the exact history of the separation decides which one you are invoking.
Same case, same court
The motion is filed in the same proceedings where separation of property was decreed, so you are returning to the court that granted it, not opening a new case elsewhere. Locate the decree, the docket number and the record before anything else. Revival is then governed by Article 67, which calls for an instrument identifying the properties to be contributed anew to the restored regime and those each spouse retains as separate. Preparing that inventory honestly, covering everything acquired while you were apart, is the substance of the exercise.
Weigh the door that closes behind you
The article ends the list with a flat prohibition: No voluntary separation of property may thereafter be granted. Revive the regime and you give up the option of voluntarily separating your properties again later. For a couple whose reconciliation is recent, that is a serious thing to trade away, and the honest question to ask before filing is whether the reunion has settled. Take the decree, the dates of the separation and the reunion, and a list of what each of you acquired in between to a lawyer, and decide with the prohibition in mind.
Related provisions
- Family Code, Article 141 — Reviving the Former Property Regime
- Family Code, Article 67 — Reviving the Former Property Regime