Startup and Triggered Scans and Active Scan

Hello,

I have a question about the options in Startup and Triggered Scans , today the police have selected the option "Allow users to modify startup scans"

and the idea is deselect this options,for me is not correct to the users can modify the scan.

If do this change the Active Scan and Schedule Scan start in the defined time is correct ? 

The new configuration would:

And second, an active scan daily is recommended?

Regards

Miguel Angel