Several airports are implementing the new rules and regulations on the carriage of liquids/gels from today, based on the guidelines outlined to 189 member airports by the International Civil Aviation Organisation (ICAO) earlier this year.

The next 24 hours is expected to be a very challenging one for security staff and passengers as travellers must ensure that all liquids and gels are stored in containers with a maximum capacity of 100ml each, with the containers packed in re-sealable transparent plastic bags with a maximum capacity not exceeding one litre.
At the same time, transit passengers carrying duty free goods stand a good chance that their purchases will be confiscated, depending on the airport, its interpretation of the rules and whether it has implemented them to the letter or not.
For the time being the new regulations do not affect Australia and New Zealand which are planning to implement the rules on March 31. As already reported, Australia's current interpretation of the rules will effectively mean the end of in-bound liquid/gel based duty free purchases, unless they are made directly at the country's arrivals shops. At the same time, Singapore Changi Airport is also understood to be delaying implementation for a month or two in an effort to introduce the new measures as efficiently as possible.
In a joint statement, the Civil Aviation Authority of Singapore and the Singapore Police told The Straits Times today that they were aware that the new rules cause confusion and inconvenience to passengers, along with ‘degradation in service standards’. Both said they want to introduce the new rules to minimise confusion for passengers.
[There is no obligation on any ICAO member airport to implement these rules, since they are only issued as guidelines, but typically most airports do follow ICAO recommendations as a matter of course-Ed].