Portuguese to English Tech/Engineering IT (Information Technology) Speed cameras

Hi All,

I am currently translating regulations for speed cameras to be used, and have come across the above which appears in a section on the software used by speed monitors when recording images and taking speed measurements. The sentence in which it appears is as follows:

"Deve haver uma atribução inequívoca de cada commando enviado através da interface de software para uma função ou uma alteração de dados do software legalmente relevante."

Many thanks in advance for any suggestions/advice.

Darren