If the parties involved go to the notary office, the following items will be required.
Literal
Parties-involved [subject-が] notary-office [to-に] go case, below-listed things [subject-が] necessary become.
Legal/administrative language. 当事者 (parties involved) and 公証役場 (notary public office) are legal terms. 場合 (in the case of) sets up the condition. 下記のもの (items listed below) is standard for document instructions. ~が必要になります marks what becomes required.