This is the 12148th most frequent Russian word.
имеющих
"Having" or "possessing."
In this sentence, 'имеющих' is used to describe members who possess a specific quality, 'interest in art', indicating possession here.
Этот клуб рад приветствовать новых участников, имеющих интерес к искусству.
This club is happy to welcome new members who have an interest in art.
'Имеющих' here functions to specify individuals possessing 'experience in the IT field', again indicating possession.
Организация ищет специалистов, имеющих опыт работы в IT-сфере.
The organization is looking for specialists who have experience in the IT field.
In this example, 'имеющих' modifies 'travelers' by providing the essential criterion of 'valid passports', linking the possession of passports to the ability to cross the border.