Have checked, no need to re-test, attach herewith the official reply for your reference.
However, please take note that government’s requirement on the test report that it should be issued by a third party laboratory accredited by an accreditation body that is signatory to the Asia Pacific Laboratory Accreditation Cooperation Mutual Recognition Arrangements (APLAC MRA) or International Laboratory Accreditation Cooperation Mutual Recognition Arrangements (ILAC MRA) whereby the scope of accreditation shall include testing for MS IEC 60086 Part 1, 2, 4 and 5 or IEC 60086 Part 1, 2, 4 and 5.