The NoToPope Coalition says in addition to today's postal drop, it will hand out condoms at a peace rally on Saturday to remind young Catholics to ''make up their own minds about what they believe is appropriate behaviour''.

The coalition said while it respected people's right to practise religion, it disagreed with the Pope's stand on contraception.

Soubhi Iskander, from the Sudanese Human Rights Association, part of the coalition, said, ''It is an immoral stance. The Pope's policy on condoms is a death sentence for millions within Africa.''

Anthony Englund, from Sydney Atheists, also part of the coalition, said the young people who would receive the condoms were capable of making up their own minds about whether or not to use them.

''Young Catholic people are quite capable of distinguishing what they want from their church's theology and what they do not want,'' he said.

''By providing them with a token number of condoms we're reminding them they can make up their own minds about what they believe is appropriate behaviour in terms of their personal sexual health.''

Members of the coalition will hold a peaceful protest at midday on Saturday at Taylor Square, in Sydney's Darlinghurst, to defend their right to protest, say no to homophobia, and promote condom use.

Two coalition activists who challenged the validity of special police powers imposed for World Youth Day will find out today if the Federal Court has decided to repeal them.

The activists took the NSW Government to court last week to challenge the validity of the powers, which allow protesters to be fined up to $5500 for annoying pilgrims.

John Griffiths, SC, for the activists, told the Federal Court the provisions denied the implied constitutional right to free speech, and were excessive.

The centre which will coordinate the response to any disaster during World Youth Day is up and running.

Several hundred personnel will staff the State Emergency Operations Centre in central Sydney throughout the Catholic celebration. NSW Emergency Services Minister Nathan Rees said the centre would coordinate agencies such as the NSW fire brigades, police, health services and transport in the event of an attack or disaster.

The centre would also coordinate the response to any significant issue that could arise elsewhere in the state during the event. AAP