Both flexible schedule options permitted employees to earn and carry over 4 credit hours. Under the compressed schedule program, full-time employees could work a 5-4/9 or a 4/10 schedule. Similar to flexible work schedules, both compressed schedules included a flexible time band and core time.
You may use a certificate of citizenship or a naturalization certificate, to prove that you are a US citizen. But both the documents are not the same. A US citizenship certificate is granted to a person who acquires or derives citizenship from his US citizen parents.
You can use your original Naturalization Certificate or Certificate of Citizenship as proof of citizenship. If you have lost either of your certificates, you can apply for a replacement using Form N-565. The instructions to N-565 explain how to file and the process in greater detail.