Permission, approval, or authorization — official or explicit allowance to do something (including licenses).
工事を始めるには行政の許可が必要だ。
You need government permission to start construction.
写真撮影の許可を係員に求めた。
I asked the staff for permission to take photos.
このソフトを使うには利用許可が必要だ。
You need authorization to use this software.