Attendance at the quarterly safety briefing is obligatory for all warehouse staff.

所有倉庫員工都必須出席每季的安全簡報。

Please note that a signed nondisclosure agreement is obligatory before the interview can proceed.

請注意，面試進行前必須先簽署保密協議。

Travelers should know that a valid passport is obligatory for this international tour package.

旅客應知道，參加這個國際旅遊行程必須持有效護照。