To look deeper at the Second part of the Standing instruction, here is a list of Handbook quotes about it: 

• "Legionary duty requires from each legionary: ... Second, the daily recitation of the Catena" (Handbook 18:7) 

• Composed principally of the Magnificat. Mary's own prayer…"the most humble and grateful, the most sublime and exalted of all the Canticles” (St Louis-Marie de Montfort)

• As the name implies, this is the link between the Legion and the daily life of all its members, active and auxiliary, and the bond, which unites them one to another and to their Blessed Mother.

•  The name is suggestive, too, of the obligation of daily recitation. Let the idea of a chain, composed of links - each link vital to perfection - be to each legionary an admonition against forming a broken link in the Legion’s chain of daily prayer.

•  Legionaries whom circumstances have forced to relinquish active membership (and even those whom less weighty reasons have caused to forsake the ranks) should still keep up this beautiful practice and preserve at least this bond with the Legion unbroken during life  (Handbook 33:6)

•  "I lay special stress on the Magnificat because it seems to me that it may be considered, in a way perhaps not commonly realized, a document of outstanding importance in its bearing on Mary's Motherhood of grace. The most holy Virgin, identified with Christ as we know her to have been from the moment of the Annunciation, proclaims herself the representative of the entire human race, intimately associated with 'all generations,' and bound up with the destinies of those who are truly her own. This canticle of hers is the song of her spiritual maternity." (Bernard, O.P.: Le Mystère de Marie)

• "The Magnificat is Mary's prayer par excellence, the song of the Messianic times in which there mingles the joy of the ancient and new Israel. As Saint Irenaeus seems to suggest, it is in Mary's canticle that there was heard once more the rejoicing of Abraham (cf Jn 8:56) who foresaw the Messiah, and there rang out in prophetic anticipation the voice of the Church . . . And in fact Mary's hymn has spread far and wide and has become the prayer of the whole Church in all ages." (MCul 18) (Handbook 18:10

• The Catena is represented as to its name by the chainborder of the Legion picture.