Singapore Infocomm Media Development Authority (IMDA) recently published an updated Short Range Devices (SRD) Technical Specification – IMDA TS SRD Issue 1 Revision 2, Aug 2021 version.
This Technical Specification has replaced the IMDA TS SRD Issue 1 Revision 1 (April 2018), and has been revised to cater for wider variety of SRD applications
coexisting in the frequency sharing environment to the extent possible by implementing different criteria for spectrum access.
Source Link: Singapore – IMDA published updated Short Range Device (SRD) Technical Specification
