Must you be the super-user to lower your process’s nice value (i.e., to raise the process’s priority)?

What will be an ideal response?

You must be the super-user to lower a process’s nice value to a negative value (i.e., below the
default value of zero). If you have previously raised the value, you do not need to be the super-
user to lower it as long as you go no lower than the original default of zero.