If it doesn't, leave it off the application. However, without a copy of your transcripts, most government personnel officials will disregard your education. It's fine to call the employer before your interview and ask them to describe the mission of their office and how the duties of your position fit in the overall structure. Learn about an interviewer's successes and praise him. Don't overdo it.
Most managers like to prepare for interviews.
If you show up early, you risk interrupting their preparation. Of course, being late is even worse. Most managers realize this, and once skeptical, will be inclined to doubt the truth of your entire application. Be friendly, modest and mildly reserved. A quality resume and cover letter writing service.