#69 - In the Prayer of the Faithful, the people respond in a certain way to the word of God which they have welcomed in faith and, exercising the office of their baptismal priesthood, offer prayers to God for the salvation of all.
It is fitting that such a prayer be included, as a rule, in Masses celebrated with a congregation, so that petitions will be offered for the holy Church, for civil authorities, for those weighed down by various needs, for all men and women, and for the salvation of the whole world.
#70 - As a rule, the series of intentions is to be:
a) for the needs of the Church;
b) for public authorities and the salvation of the whole world;
c) for those burdened by any kind of difficulty; and
d) for the local community.
Nevertheless, in a particular celebration, such as a confirmation, a marriage, or a funeral, the series of intentions may reflect more closely the particular occasion.
#71 - It is for the priest celebrant to direct this prayer from the chair. He himself begins it with a brief introduction, by which he invites the faithful to pray, and likewise he concludes it with a prayer.
The intentions announced should be sober, be composed freely but prudently, and be succinct, and they should express the prayer of the entire community.
The intentions are announced from the ambo or from another suitable place, by the deacon or by a cantor, a lector, or one of the lay faithful.
The people, however, stand and give expression to their prayer either by an invocation said together after each intention or by praying in silence.
#138 - After the recitation of the Creed, the priest, standing at the chair with hands joined, by means of a brief introduction, invites the faithful to participate in the Prayer of the Faithful.
Then the cantor, the lector, or another person announces the intentions from the ambo or from some other suitable place while facing the people, who take their part by responding in supplication.
After the intentions, the priest, with hands extended, concludes the petitions with a prayer.
#43 - The faithful should stand … during the Profession of Faith and the Prayer of the Faithful …
[General Instruction of the Roman Missal Third Edition]