This won't mean anything at all to you unless you've read the first two parts.
In 1570, S Pius V promulgated the Missal with which his name is associated. In it, as we have seen, he continued the use of the Versio Romana for the snippets of psalm which occur (Introit, Gradual, etc.) in the Mass propers. Despite the fact that they were a text which differed from the standard Vulgate text of the Bible which was used in the Breviary, S Pius, as a good conservative Pontiff, perpetuated the use of the 'obsolete' psalter. With collaudate in that psalm.
But 1570 was followed by a period in which the Church was consolidating against heresy, and part of this process was the establishment of the Vulgate Latin Bible as the standard version of reference for Catholic theologians (Popes Sixtus V and Clement VIII through the 1590s). Printers are clever and energetic men. So, without encouragement from the Holy See, they began to print editions of the Missal in which they replaced the Versio Romana texts by the equivalent translation in the recently affirmed official Vulgate. With laudate in that psalm.
In 1604, Pope Clement VIII reacted to this. He issued his own edition of the Missal of S Pius V. In it he wrote:
"... errors have crept in, by which that most ancient translation of the Holy Bible, which even before S Jerome's times was held to be well-known (celebris) within the Church, and from which almost all the introits of Masses, and what are called graduals and offertories, have been taken, was totally taken away ... we, having noticed this, by virtue of our pastoral solicitude, by which in all matters, and especially in the sacred rites of the Church, we are anxious to keep and preserve the best and ancient norm ...
and he went on to prohibit absolutely these Improved and Modernised Missals with which the printers were filling the bookshops. Back to collaudate!
Here we see two Roman Pontiffs performing their age-old duty of being a breakwater, a defence (remora was Newman's term) against unnecessary innovation and trendy Improvements.
We see Clement VIII doing this even though those printers had only been guilty of prioritising that very text of Scripture which he himself had just published and had ordered to be deemed authentic.
That is what Roman Pontiffs are for.
To sum up this three-part dissertation:
S PIUS V = GOOD
CLEMENT VIII = GOOD
PIUS XII ... ... er ...
S JOHN PAUL II = GOOD
Isn't that a lovely phrase ..."the best and ancient norm ..."?