When Fr. John Direen addressed our annual liturgical ministers meeting, he made frequent reference to a document published by the US Conference of Catholic Bishops. The document, Co-Workers in the Vineyard of the Lord, is available on their website in English and in Spanish
Co-Workers in the Vineyard of the Lord expresses the bishops’ strong desire for the fruitful collaboration of ordained and lay ministers who, in distinct but complementary ways, continue in the Church the saving mission of Christ for the world, his vineyard.
There is also an extensive Frequently Asked Questions about Lay Ecclesial Ministry on their website.