Here is the authoritative decree on the CCC
APOSTOLIC CONSTITUTION
FIDEI DEPOSITUM
Here are some sentences that jump out out at me.
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To respond to this twofold demand, the Catechism of the Catholic Church on the one hand repeats the “old”, traditional order already followed by the Catechism of St. Pius V, arranging the material in four parts: the Creed, the Sacred Liturgy, with pride of place given to the sacraments, the Christian way of life, explained beginning with the Ten Commandments, and finally, Christian prayer. At the same time, however, the contents are often presented in a “new” way in order to respond to the questions of our age. Let’s get this straight. It follows the order of St. Pius V.
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The Catechism of the Catholic Church, which I approved 25 June last and the publication of which I today order by virtue of my Apostolic Authority, is a statement of the Church’s faith and of catholic doctrine, attested to or illumined by Sacred Scripture, the Apostolic Tradition and the Church’s Magisterium. I declare it to be a sure norm for teaching the faith and thus a valid and legitimate instrument for ecclesial communion. So he invokes his Apostolic Authority to defend its content. This is rarely mentioned Traddom when speaking about the CCC.**
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This catechism is given to them that it may be a sure and authentic reference text for teaching catholic doctrine and particularly for preparing local catechisms. It is to be the reference for future catechisms.**
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This catechism is not intended to replace the local catechisms duly approved by the ecclesiastical authorities, the diocesan Bishops and the Episcopal Conferences, especially if they have been approved by the Apostolic See. It is meant to encourage and assist in the writing of new local catechisms, which take into account various situations and cultures, while carefully preserving the unity of faith and fidelity to catholic doctrine. Local Catechisms, can remain in place.**
So this catechism is more formal and more official that this forum likes to admit. It’s just one of a bunch of catechism. But at the same time, it’s meant to be a springboard for writing new catechism that are for the common man’s use. That sounds fair to me.