This is the 2983rd most frequent Dutch word.
betreffende
"Concerning" or "regarding."
In this sentence, 'betreffende' is used as an adjective, synonymously to 'regarding,' to specify that the information pertains to the new rules.
De informatie betreffende de nieuwe regels is beschikbaar.
The information regarding the new rules is available.
Here, 'betreffende' is used as a preposition to indicate that the question is about the schedule.
Ik heb een vraag betreffende het rooster.
I have a question concerning the schedule.
In this usage, 'betreffende' functions as a preposition to relate the topic of the discussion to the budget.