Hong Kong, a key hub for the ivory trade and manufacturing, announced plans last year to phase out sales completely by 2021.
Government officials bought the pair of ivory chopsticks from a crafts shop during an operation last August in the city's Sheung Wan district, which is dotted with curio and antique vendors.
Radiocarbon dating showed the ivory was obtained after 1990, according to an earlier government press release.
The pair were yesterday handed fines of USD 770 and USD 1,000 respectively.
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While environmental groups welcomed the use of forensic evidence, they condemned the light penalty, compared with the maximum punishment of a USD 640,000 fine and two years in jail.
Domestic trade in ivory imported legally into Hong Kong before 1990 is legal with a government licence.
"Today's sentencing is a strong reminder that penalties in Hong Kong need to increase to reflect better the gravity of wildlife crime and be an effective deterrent to prevent illegal ivory traders from carrying out similar acts in future," said Yannick Kuehl of wildlife trade monitoring network TRAFFIC in a statement.
Critics have argued Hong Kong's five-year timetable to outlaw sales was too slow and would attract ivory laundering to the city as mainland China moves forward with the ban.
Conservationists estimate that more than 20,000 elephants were killed for their ivory in 2015, with similar tolls in previous years.
The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which took effect in 1975, banned the ivory trade in 1989.
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