Just for Clarification, Secular Carmelites, Secular Franciscans, Secular Domnicans and Oblates of St. Benedict are not Secular Institutes.
They are Secular Religious Orders. They do make perpetual commitments. Canon law does not allow one to belong to more than one at a time. One may be either celibate or married in a Secular Religious Order. The Lay Dominicans are not a Secular Religious Order, they are an Association of the faithful. That’s why they have a slightly different law regarding membership. Secular Franciscans and Secular Carmelites are orders. They are governed by the same canons as the friars. The lifestyle of most Secular Orders is similar, even though the spiritual emphasis is different.
Secular Institutes make perpetual vows of chastity, poverty and obedience, and they are celibate. They own property as individuals and as a corporate body, they are subject to the authority of the local bishop. The latter is the the difference between them and religious congregations. Religioius congregations are not bound to the authority of the local bishop in matters regarding their life.
There are Secular Institutes that are exempt from the local bishops through a papal indult. For example, the Vincentians are a Secular Institute, the Daughters of Charity, St. Elizabeth Ann Seton’s Sisters of Charity, the Institute of Christ the King, The Sons of the Most Holy Redeemer (Transalpine Redemptorists) Maryknoll and Opus Dei. These communities answer to the Sacred Congregation for Religious and Secular Institutes. Do not confuse secular orders with secular institutes. Not the same . . .
The vows in each of these communities are going to be different. For example, most people do not know that Benedictine Monks do not make the three vows. They make only two vows: Obedience and Stability. Other people do not know that the Jesuits are a society, not a religious order, however, they make the same vows as the Franciscans do, Solemn vows of poverty, obedience and chastity. Most religious do not make solemn vows, only monks and mendicants.
It is also important to know that when you make a solemn vow any attempt to make marriage vows is null and void. But when you make simple vows, the marriage vows are valid. Religous in congregations who ilicitly attempt marriage are validly married. Religious who are monks, mendicants or Jesuits, are not validly married.
This is another good reason to discern well before deciding. Discernment should be accompanied by education.
I just wanted to add to what you wrote, as this is such an interesting and complex area in the Church.
On another note, you said that you’re attempting to begin a chapter of the Dominicans in your parish. Here is another difference between an Association of the Faithful and a Secular Religious Order. Secular Religious Orders cannot be established in any parish without two permissions: the Superior General of the Secular Order and the consent of the local bishop. For example, one cannot establish a Secular Franciscan fraternity in a parish without permission from the Minister General of the Secular Franciscan Order. One must take that permission to the local bishop. The Secular Orders do not depend on the friars. They are autonomous in government, in their rule, and in their mission.
Interesting, isn’t it?
JR