Let's get back to the future.
I don't know whether or not Knox and her lawyers have sent an application to the ECHR claiming that Italy violated Knox's rights under the Convention in the re-conviction trial, but I believe that would be extremely likely if they are seeking a means to overturn the re-conviction. I believe that Italian law (CPP Article 628-bis) requires a final ECHR judgment that specifically finds the re-conviction trial was unfair to lawfully quash the re-conviction.
I don't believe the supervisory action of the CoM, even if the CoM soundly scolds Italy for the re-conviction, by itself can lawfully lead to Italy quashing the re-conviction, again because of the specific wording of CPP Article 628-bis. However, if the CoM sends its own application to the ECRH, which would require the agreement of 2/3 of the ECHR member states, asking the ECHR to find that Italy has violated Convention Artilce 46, paragraph 1 ( binding force of ECHR judgments), and that the re-conviction trial was unfair (a violation of Convention Article 6). To date, this CoM process has only been tried twice, and against states even more resistant to abiding by ECHR judgments than Italy. Therefore, it would be in Knox's interests, and the interests of justice, for Knox and her lawyers to have applied to the ECHR rather than choosing to wait for the CoM supervisory action to seek an ECHR judgment on a violation of Article 46.
I believe that if Knox or the CoM argue that the re-conviction must be overturned on the basis of the 2019 final ECHR judgment Knox v. Italy, that the Italian government and Italian CSC will insist that the re-conviction is a new trial based on new evidence not presented in the original conviction for calunnia, and therefore the 2019 Knox v. Italy ECHR judgment does not apply to it. I believe that the Italian government and CSC will insist that only a new ECHR judgment specifically on the re-conviction trial can satisfy CPP Article 628-bis and cause the CSC to quash the re-conviction. The Italian government and CSC can also argue that, according to paragraph 2 of CPP Article 628-bis, the request to the CSC for an action resulting from an ECHR final judgment of unfairness must be brought to the CSC within 90 days of the relevant final ECHR judgment; because CPP Article 628-bis was a new law, this requirement did not apply to Knox's original request to the CSC, but I suspect that the Italian government and CSC would impose it on a new request because, they would argue, the re-conviction trial was new and not itself reviewed by the ECHR. Some readers here might think that such behavior by the Italian government or CSC would be unethical or dishonest; I would not disagree. The re-conviction itself, based on the text of the Motivation Report was unethical and dishonest, in my opinion.
Here's the first paragraph of CPP Article 628-bis:
Google translation (with help from Reverso Context):
Source:
https://www.altalex.com/documents/n...ecuzione-decisioni-corte-europea-diritti-uomo