Hi there,
i believe this term could be rendered as
"البالغ المُعِيل"
so the whole phrase should be something like "البالغين المعيلين للقصر"

also depending on the full context it may be rendered as "الولي المُعِيل"

Feel free to check this legal reference for minors legal status, as understanding them should help you a lot with the rest of the text.

http://experts-articles.blogspot.com/2009/08/blog-post_8770....


Hopefully that would be of any help :)

You should provide more context for more accurate rendering.