Under a Chapter II subheading, “Aids to the Proper Celebration of the Liturgy of the Word,” we have three numbered sections devoted to “the Place for the Proclamation of the Word of God.”
32. There must be a place in the church that is somewhat elevated, fixed, and of a suitable design and nobility. It should reflect the dignity of God’s word and be a clear reminder to the people that in the Mass the table of God’s word and of Christ’s body is placed before them.  The place for the readings must also truly help the people’s listening and attention during the liturgy of the word. Great pains must therefore be taken, in keeping with the design of each church, over the harmonious and close relationship of the ambo with the altar.
33. Either permanently or at least on occasions of greater solemnity, the ambo should be decorated simply and in keeping with its design.Since the ambo is the place from which the word of God is proclaimed by the ministers, it must of its nature be reserved for the readings, the responsorial psalm, and the Easter Proclamation (the Exsultet). The ambo may rightly be used for the homily and the prayer of the faithful, however, because of their close connection with the entire liturgy of the word. It is better for the commentator, cantor, or director of singing, for example, not to use the ambo. 
34. In order that the ambo may properly serve its liturgical purpose, it is to be rather large, since on occasion several ministers must use it at the same time. Provision must also be made for the readers to have enough light to read the text and, as required, to have modern sound equipment enabling the faithful to hear them without difficulty.
These last bits are common sense provisions. Anything you see important or even missing in the GILM’s discussion on the ambo?