How does one become a "lay-minister" in the Catholic Church?

Wikipedia definition: > Lay ecclesial ministry is the term adopted by the United States Conference of Catholic Bishops to identify the relatively new category of pastoral ministers in the Catholic Church who serve the Church but are not ordained. Lay ecclesial ministers are coworkers with the bishop alongside priests and deacons. Is there a more or less standardized certification process? Is there a formal education requirement? Does it depend on the ministry? Must a priest sponsor the minister? What about the bishop?