Regarding hiding a voice for specific number of systems (not to just hide it always if its not used)

Helloo there! I have a piece which is seperated in two parts. In the first part, i have a voice which i want it to be visible always, even if it has not any notes in a whole system (or more than one systems). But in the second part, i want this voice to be hidden when she does not have any notes in the system.

What i know is, how to make a voice invisible when there are not any notes in a specific system, but this feature applies for the whole score. So i dont know how to hide it in specific systems.
Thank you in advance! have a nice day or night!