The Consumer Product Safety Office (CPSO) of Singapore published a circular on February 10, 2023, to clarify the types of products classified as multi-way adaptors under the Consumer Protection (Safety Requirements) Regulations.
Below are the main points:
1. Multi-way adaptors used for household, have more than one set of socket contacts and which may or may not be of the same type as the plug pin portion will require Safety Mark.
2. Conventional multi-way adaptors like picture below will need to be tested and certified to SS145-3, registered and affixed with the Safety Mark before being sold in Singapore.

3. Newer designs of multi-way adaptors like picture below also fall under scope SS145-3.


As of February 11, 2024, all Multi-Way Adaptors of all shapes and designs must display a valid Safety Mark in order to be sold in Singapore.
Source:
https://www.consumerproductsafety.gov.sg/files/circulars/2023-02-10-Circular.pdf
BACL Service:
BACL can provide you efficient and reliable global market certification services, such as IECEE CB Scheme NCB and CBTL, United States(NRTL, FCC, ENERGY STAR), Canada(ISED, SCC), EU(CE), United Kingdom (UKCA AB & AOC), Northern Ireland(UKNI), Korea(KC), Japan(MIC), Singapore(IMDA), Hong Kong(OFCA), Taiwan (NCC, BSMI), Egypt (NTRA, GOEIC), South Africa(SABS), Vietnam (MIC), Saudi Arabia (SASO, CITC), Philippines (NTC), Thailand (NBTC), Malaysia (SIRIM), India(BIS, WPC, TEC)and other services to assure your products still smoothly entering into the international trade market even when the international trade barriers are becoming increasingly fierce.

CN/中国
US/USA
KR/Korea
DE/Germany
ES/Spain
VN/Việtnam