The Myanmar leader defended the security forces and said the imprisoned journalists can appeal.
The measures, which became law Wednesday with their publication in the Royal Gazette, cover selection of members of Parliament and senators.
James Ricketson has been held since June last year when he was detained after flying a drone to photograph an opposition party political rally.
McCain died of brain cancer Saturday in his home state of Arizona.
More than 500 other Cambodians have already been repatriated.
Opposition Cambodia National Rescue Party was dissolved by court last year for alleged complicity in treason plot.
No reason specified for pardons, but they come just days after a sweeping election victory by Hun Sen's ruling Cambodian People's Party was officially certified.
The three men were all facing deportation to Cambodia despite having served their sentences and living in the US as lawful permanent residents.
Wirapol Sukphol sentenced to more than 100 years in connection with funds he fraudulently raised from followers.
The annual meeting of the 10-nation bloc opens with security concerns.
កញ្ញា កឹម មនោវិទ្យា បាននិយាយថា កញ្ញាមិនអាចត្រឡប់ទៅប្រទេសកម្ពុជាវិញនោះទេ ពីព្រោះកញ្ញាខ្លាចថា កញ្ញានឹងត្រូវគេចាប់ខ្លួនដែរ ដែលនេះជាផ្នែកមួយនៃការបង្ក្រាបរបស់រដ្ឋាភិបាលដែលបានរំលាយគណបក្សសង្គ្រោះជាតិ បំបិទប្រព័ន្ធផ្សព្វផ្សាយឯករាជ្យ និងបង្ខំឲ្យអ្នកនយោបាយខ្មែរ សកម្មជនសិទ្ធិមនុស្ស និងអ្នកសារព័ត៌មានរាប់រយនាក់ រស់នៅនិរទេសខ្លួននៅក្នុងសហរដ្ឋអាមេរិក ប្រទេសអូស្ត្រាលី ប្រទេសថៃ និងប្រទេសផ្សេងៗទៀត។
Dam collapsed Monday, releasing large amounts of water that swept away houses, flooded villages, and made more than 6,600 people homeless.
The victory could extend his boxing career, which had taken a backseat to his political life.
Foreign helpers, including some of the world’s best cave divers, also began travelling home.
In January, Taiwan prosecutors said they found evidence that China's Taiwan Affairs Office promised to pay a Taiwanese politician $500,000 to run a website publishing articles promoting unification.
The Hollywood-movie storyline embraced the best of technology and was void of divisive politics.
More than 50 people were unaccounted for as of Tuesday morning.
The boat was one of two that overturned in bad weather off the resort island of Phuket.
Radio Free Asia spokesman Rohit Mahajan says RFA told authorities that it was unwilling to bow to their pressure to use a term other than Rohingya to describe Muslim minority.
Celebrity Chefs, fans and U.S. President Donald Trump were among those stunned and saddened by the news.
ព័ត៌មានផ្សេងទៀត
