What it means
ことになっている expresses an established arrangement, rule, schedule, or expectation. It often describes something that has been decided by an organization or situation rather than by the speaker personally. With a verb in the dictionary form, it means that someone is scheduled or expected to do something; with a verb in the ない form, it means that someone is expected or required not to do something.
Usage note
ことになっている describes an externally established decision or rule. Do not confuse it with ことにしている, which usually describes a decision or habit that the subject has chosen personally.
How to use it
来週、全員が健康診断を受けることになっています。
Next week, everyone is scheduled to have a health checkup.
この施設では、利用者は室内で靴を脱がないことになっています。
At this facility, users are not supposed to take off their shoes indoors.
来週、全員が健康診断を受けることになっている。
Next week, everyone is scheduled to have a health checkup.
この施設では、利用者は室内で靴を脱がないことになっている。
At this facility, users are not supposed to take off their shoes indoors.