英文成绩单需要翻译机构认证么还自己翻译学校盖章就okay了？

1.英文成绩单需要翻译机构认证么还自己翻译学校盖章就okay了？
看到UCSD官网上写的  Acceptable documentation includes:
Originals issued by the university bearing the original stamp or seal and the signature of the authorized official.
Official copies issued by the degree granting university bearing the stamp or seal and signature of the authorized official.
Official literal (word for word) English translations issued by the degree granting institution.
Translations prepared by an accredited member of a translator's association, such as American Translator’s Association (ATA), are acceptable. They must be prepared from official copies of your academic records or degree certificate, in the original language. For more information and a directory of members, consult the Services Directories on the ATA website. 是必须翻译机构认证才可以么
2.中英文成绩单格式必须一致么？