Among the affected venues and a 500-metre perimetre around each are The Shangri-La Hotel where the 40th anniversary summit is taking place, The Raffles City Convention Centre site of a gala dinner and the Asian Civilizations Museum where a reception will be held.
Nearly 1,000 delegates from 43 countries are attending.
While the charter, a blueprint for an ASEAN economic community by 2015, and a document on climate change and the environment are highlights, diplomats said Burma is overshadowing the other issues after its bloody crackdown on pro-democracy protesters in September.
ASEAN countries have made many commitments over the years, but have only implemented a third of them, said Professor Tommy Koh, Singapore's representative on the task force which drafted the charter.
"This is not an acceptable record," Koh said. "A key feature in the charter is the emphasis on developing a culture of taking our obligations seriously," he added.
The secretary-general will be empowered to monitor compliance with ASEAN agreements and report breaches to the summit, he said.
Referring to critics who maintain that ASEAN is little more than a "talk shop, Koh said the charter will enable the grouping to play a bigger role in regional and global affairs.
ASEAN includes Singapore, Thailand, Malaysia, Indonesia, the Philippines, Brunei, Cambodia, Laos, Vietnam and Burma.
The UN Secretary General's special Adviser Ibrahim Gambari is scheduled to brief the East Asia Summit which includes the ASEAN countries in addition to China, India, Japan, South Korea, Australia and New Zealand.
Police have warned against staging any outdoor protests after learning of plans by foreign students to do so on Monday.
A petition was released however calling on the UN Security Council to bring "tangible results" in the national reconciliation and political reform process.
The document was signed by 3,626 people or 10 per cent of the Burmese nationals in Singapore.
A group calling themselves the "Overseas Burma Patriots" said they want Singapore to give the petition to the council.
Public demonstrations against Burmese junta have flared elsewhere, but police said Singapore's prohibition against outdoor gatherings of more than four people without official approval is in full force.
ASEAN admitted Burma a decade ago despite opposition from the United States and the European Union over its human rights record and detention of pro-democracy leader Aung San Suu Kyi.
Critics maintain that keeping ASEAN's policy of non-interference in other members' affairs and continuation of decision-making by consensus could result in a "paper tiger."
While creating a human rights body, they point out the draft of the new charter lacks an effective enforcement mechanism.