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.
In the U.S., the issuance of birth certificates is a function of the states, even though birthplace is a determinant of American citizenship. The federal and state governments have traditionally cooperated to some extent to improve vital statistics.