Buongiorno Dana,

The Italian word "dispositivi" can be translated to English as "devices". "Poteri" means "functions". Generally speaking, "poteri dispositivi" means "device functions". Since "poteri" comes from the verb "potere" meaning "can / to be able to..", we can interpretate this word as capacities/functions.

Good luck with your project.

Natalya

I found the following translation in the biobank document in the link:

A good model for the legal structure of the Research biorepositories is that of the Charitable Trusts, by which a citizen donor transfers his/her own powers to a trustee, who has a legal duty to use them in the interest of a beneficiary, in this case the community.

Un buon modello per la struttura legale delle Bioteche di ricerca è quello di Charitable Trust, per cui un cittadino donatore attribuisce i propri poteri dispositivi a un fiduciario, che ha il dovere legale di usarli nell’interesse di un beneficiario, in questo caso la collettività.

You could also write "dispositive powers"

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Note added at 30 mins (2020-07-26 10:11:40 GMT)
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I made a typo sorry.
The title should be dispositive and not disposative

I think you can definitely translate this as just "devices". I believe powers is implied given the context.