The word 'provided' in this sentence is another way of saying "as long as". Example: He's welcome to come along, provided that he behaves himself.

To be clear, the phrase is "provided that" Sometimes, you will see it without the word "that"

"provided that" = if, on the condition that (if and only if) Teenagers can work part-time provided that their jobs take place after school hours. Parent to child: You can watch tv, provided that you've finished all your homework. I'll be there at noon, provided that there's no traffic. If you can access Cambridge Dictionary you can see more examples https://dictionary.cambridge.org/us/dictionary/english/provided-that .