Code of Professional Responsibility and Accountability (CPRA)
Section 29. Lawyers formerly in government service. - A lawyer who has left government service shall not engage in private practice pertaining to any matter before the office where he or she used to be connected within a period of one (1) year from his or her separation from such office. Justices, judges, clerks of court, city, provincial, and regional prosecutors shall not appear before any court
within the territorial jurisdiction where they previously served within the same period. After leaving government service, a lawyer shall not accept an engagement which could improperly influence the outcome of the proceedings which the lawyer handled or intervened in, or over which the lawyer previously exercised authority, while in said service.