Canon law does not permit a parish to be altered in its juridic structure (i.e., suppressed, merged with another parish, or combined in some other juridic grouping) except for a just cause.
A just cause is required because the Church's law prioritizes, as of paramount importance, the duty of safeguarding the rights of Christ's faithful. Foremost among these rights is the assurance of access to pastoral care provided in a stable manner. The parish is the main place where the faithful have access to pastoral care. Therefore, the diocesan Bishop has to assure that parishes are established and that churches are erected in a way that is equitable throughout the diocese. In all such matters, the church's law favors preserving the stability of parishes (leaving them as they are).
A just cause is never required for leaving a parish as it is. A just cause is always required for changing its juridic structure (i.e., merging or suppressing it or combining it into some other juridic grouping).
All of these requirements of the law seek to assure that the diocesan bishop makes well-informed, prayerfully discerned decisions for the spiritual well-being of the archdiocese, taking into account the needs of the faithful for pastoral care as well as the overall needs of the archdiocese. After consultative input from the Presbyteral Council, Archbishop Rozanski will study and prayerfully discern the proposals before announcing a final decision on May 28, the Solemnity of Pentecost.