it will remain permanent as long as you don't reinstall windows 7. in case you decide to reinstall win7, you will have to run again daz loader for the activation.
Modding the bios with slic 2.1 is needed for people who want to install win7 on UEFI as daz loader does normally work only on MBR disk but you can make it work on GPT disk as well by injecting slic 2.1 into the bios and thus in this case modding the bios will allow to get win7 activated with daz on UEFI with GPT disk.
Fixed, https://forums.mydigitallife.net/threads/award-ami-bios-mod-requests.5863/page-3089#post-1452688