This is the 555th most frequent Hungarian word.
kötelező
Mandatory.
Here, 'kötelező' is used to express the requirement or mandate that an action must be followed as per rules or regulations.
A biztonsági öv használata kötelező.
Wearing a seat belt is mandatory.
In this sentence, 'kötelező' describes an obligatory condition where wearing the uniform is a requirement.
Az iskolai egyenruha kötelező viselet.
The school uniform is a mandatory attire.
This usage of 'kötelező' emphasizes the necessity of accomplishing an action within a specified context or time frame.