My grandfather's permission to emigrate is in two parts -- because he was a minor of age 17. There is his father's affidavit that he has his parents' permission to emigrate and then the government document.
Even though it pertains to emigration from Ost Friesland rather than Hannover, I'm sure the documents were standard, though he did not emigrate until about 1917 (without looking that's a guesstimate.) I have been planning to post it on my Web site since I got it just last week, and will get to that sooner rather than later, but not before this afternoon. I'll let you know when it is up. I have both the German document and an English translation done by my aunt.
Loretta