English to Italian Law/Patents Law (general)

Nella posizione in cui si trova mi aspetterei piuttosto un verbo... Ma forse anche in questo caso si tratta di una formula che semplicemente non ho mai incontrato, in ogni caso non riesco a trovare una resa convincente in italiano...

GIVING AND GRANTING to the Attorney in fact full power and authority to do and ***person*** every act necessary, requisite, or proper to be done as fully as Client might or could do if personally present, with full power of substitution and revocation, hereby ratifying and confirming all that the Attorney in fact may lawfully do or cause to be done by virtue of this Power of Attorney.

Grazie per i suggerimenti!