Some of the contestants have already arrived for the competition set to be held partly on Bali, where the opening ceremony is to be held Sunday, with the final round set for Sept. 28 on the outskirts of Jakarta.
Last week, the Indonesian Ulema Council, the country's most influential clerics group, urged the government to cancel the event, saying the exposure of skin by women in such a competition violates Islamic teachings, even after organizers agreed to cut the bikini competition and instead outfit contestants in more conservative sarongs.
The chairwoman of the Miss World Organization, Julia Morley, earlier confirmed that none of the contestants would wear a bikini.
Most Muslims in Indonesia, a secular country of 240 million people and the world's most populous Islamic country, are moderate, but a small extremist fringe has become more vocal in recent years.