The African National Congress Tuesday proposed a conference of all South Africa's political parties to clear the way for a post-apartheid constitution, but two key political rivals swiftly rejected the plan.

The Zulu-based Inkatha movement objected to a major element of the proposal and the white-supremacist Conservative Party ruled out participation.Pretoria has resisted similar proposals in the past, but Deputy ANC President Nelson Mandela appeared confident President Frederik de Klerk would accede to an all-party meeting and "has said nothing" to decisively rule it out.