Protesters say they are willing to break the law and hand out condoms to Catholic pilgrims during this month's World Youth Day celebrations in Sydney.

Powers approved by the NSW government allow for people who continually annoy or inconvenience pilgrims during the event, to be staged in Sydney from July 15 to 20, to be arrested and possibly fined $5,500.

Protest group, NoToPope Coalition are concerned the regulations will be used to stop demonstrations during World Youth Day events, but that they could also effectively ban things like wearing a T-shirt with a slogan considered to be anti-Catholic.

NoToPope spokeswoman Rachel Evans said the group was seeking legal advice on whether it could challenge the "thou shalt not offend" laws.

But she said the group would still carry out its protest in the CBD on July 19, and go ahead with its plan to hand out condoms to young pilgrims.