Once again you are mistaken. It was Pope St. John Paul II who introduced the novelty of altar chickettes" in 1994.
From the point of view of liturgical law, an official interpretation of Canon 230, Paragraph 2, of the Code of Canon law on the possibility of delegating certain liturgical offices led to a 1994 letter from the Congregation for Divine Worship and the Sacraments clarifying that girls may serve at the altar.
Despite the following:
Inaestimabile donum 18: "There are, of course, various roles that women can perform in the liturgical assembly: these include reading the Word of God and proclaiming the intentions of the Prayer of the Faithful. Women are not, however, permitted to act as altar servers".
Liturgicae Instaurationes 7. In conformity with norms traditional in the Church, women (single, married, religious), whether in churches, homes, convents, schools, or institutions for women, are barred from serving the priest at the altar".
- See more at: http://www.adoremus.org/0302Altargirls.html#sthash.z9LQPoT5.dpuf
I was wrong, but priests DO NOT have to use girls at the altar, and I know parish priests that refuse to use them.
“In granting the permission the Pope gave to each bishop the full authority to decide whether pastoral circumstances in his diocese necessitated the authorization of altar girls. In an interpretation of this ruling, the Pontifical Commission for the Interpretation of Legislative Texts has stated, with papal approval, that even if a bishop permits altar girls in his diocese, priests are not required to use them.
http://www.ewtn.com/expert/answers/altar_girls.htm
“Inaestimabile donum 18: “There are, of course, various roles that women can perform in the liturgical assembly: these include reading the Word of God and proclaiming the intentions of the Prayer of the Faithful. “
1st Corinthians 14 -34-37
Let your women keep silence in the churches — for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the law.