Across Asean there is a diversity of political systems and leadership, as well as wide economic gaps.
In a meeting this week both foreign ministers said they would speed up negotiations over joint development in offshore blocs.
The Thai foreign minister made his request on an official visit to Cambodia and suggested consideration of a royal pardon.
Recently, Prime Minister Hun Sen has called for the nullification of land certificates in protected natural areas in Cambodia.
The draft law has come under continued criticism from international and local NGOs, who say it will stymie their work.
The two appeared before the Court of Appeals on Wednesday, withdrawing their appeal without explanation.
Chan Cheng and a party lawyer are accused of helping a party activist, Meas Peng, wanted for questioning in a land dispute.
The National Assembly, which is dominated by the ruling Cambodian People’s Party, voted to suspend Chan Cheng’s immunity last week.
Foreign Minister Hor Namhong told reporters that Cambodia would work toward regional integration in 2015.
Kim died of a heart attack, and while it appears Kim Jong-un will succeed him, there are questions over an internal political crisis.
Civil society leaders have said they would need at least a month to properly review the law.
Cambodia maintains friendly relations with the reclusive nation, which were forged by the former king, Norodom Sihanouk.