Target is S32K148, ONCE I ENABLED THE PARTION AND CSEC (FCCOB  = 0x03;)
Do I NEED IT D TO THIS INITIALIZATION ACROSS EVERY POWER ON REST?
which NONE VOULITILE REGISTER I need to check if don't have to this,?
I know once the part is partitioned , I don't have to it on every power up, however I am NOT certain about the CSEC ENABLING ACROSS POWE ON RESET.
there's an application note including SW examples which provides more details:
Initialization (partition and initial loading of keys) is supposed to be done only once - in factory. See example 1_Configure_part_and_Load_keys in the app note.
It's even not possible to do the partitioning again. First it is necessary to delete the partition (there's a special procedure for this - see 5_Resetting_flash_to_the_factory_state), then it is necessary to do mass erase and then you can do the partitioning again.