autoridad no dispositiva de la Ley

07:17 Sep 18, 2020 

I concur with your answer @Adrian MM and great breakdown of the wording here @Robert Carter.

Now I understand the negatives of First validated answer mode as I want to choose Adrian MM's answer as the correct one. I've reached out to a moderator but they have not replied. Hopefully, Adrian MM's answer will get another upvote or two.

21:55 Sep 17, 2020 

Regarding the other two links you posted:
https://revistas.uexternado.edu.co/index.php/derpri/article/...
That one links to a paper written in Spanish, which supports the idea of "dispositivo" meaning something akin to "optional". It gives no clue to how the word "dispositive" is used in English, or to how the two terms might be equivalent.
The other link unfortunately won't open for me because of an issue with cookies, which I don't know how to resolve :-(

Simply put, in my opinion, the meaning of "dispositivo," as it is being used in Cahalsi's text, and the meaning of "dispositive" as it is normally used in English, are completely different, i.e., they are false friends.

21:32 Sep 17, 2020 

Here is the definition of "dispositive" in Black's Law, 8th Ed.:
"DISPOSITIVE
dispositive (dis-poz-<<schwa>>-tiv), adj.1. Being a deciding factor; (of a fact or factor)
bringing about a final determination. 2. Of, relating to, or effecting the disposition of property by
will or deed."

And in Oxford:

"dispositive
Pronunciation /dɪsˈpɒzətɪv/
ADJECTIVE
1Relating to or bringing about the settlement of an issue or the disposition of property.

‘such litigation will rarely be dispositive of any question’
More example sentences
1.1(in Scots and US law) dealing with the disposition of property by deed or will.
‘the testator had to make his signature after making the dispositive provisions’
More example sentences
1.2(in US law) producing a final settlement or determination.
‘But this argument cannot be dispositive because Baker itself involved a claim that a state had abused the power of drawing district lines.’
More example sentences
1.3Dealing with the settling of international conflicts by an agreed disposition of disputed territories.
‘a peace settlement in the nature of a dispositive treaty’"
https://www.lexico.com/definition/dispositive

21:27 Sep 17, 2020 

I'll reply to your comment here as there's no more room below.

To begin with, I don't understand what you mean when you say "No Civil Law legal term in English has to be imperatively convalidated by another one in the Common Law system".
Secondly, your first link is to a document from the US courts, but the use of "dispositive" in that document has nothing to do with "rights are protected upon request", or indeed with the idea of "dispositive" meaning "optional" as Toni has linked to in his reference entry.
Here is an excerpt from that document:
(“The Court’s rulings. ... were non-dispositive, in that they did not fully resolve the case and could be challenged by a timely motion under Rule"
Here, the drafter is clearly using "dispositive" in the sense Bryan A. Garner refers on p. 285 of his "Dictionary of Modern Legal Usage", namely:
"dispositive ... In BrE and AmE alike, dispositive may mean 'conclusive, determinative.' In this sense, the word is extremely useful to lawyers—e.g.: 'The court's resolution of this case would be greatly simplified it ruled only on either of these dispositive issues.'"

14:00 Sep 17, 2020 

Ok, I asked a moderator, let's see if she can help!

13:38 Sep 17, 2020 

I don´t know if a question asked in the "first validated answer" mode can be changed or not. But why don´t you ask the moderators of this language pair. I believe it´s worth the attempt due to the relevance and difficulty of your query.

13:26 Sep 17, 2020 

@allegro trans, I didn't realise I'd checked that box, I'll bear your comments in mind. I don't think I can modify this now the Q has been posted, or can I?

13:09 Sep 17, 2020 

we have already had some discussions on this matter on different occasions. I fully agree with you. The "first validated answer" method does not convince me at all, generally speaking. There are questions that need sufficient reflection and time to be able to come to a satisfactory result.

13:06 Sep 17, 2020 

With the greatest of respect, this is not the best way to enter questions of this complexity. It effectively means the question could be closed before experienced peers have even had a chance to help you. Consider.