I think JPSA is lying.
From the Amemded Act itself":
Clause 9
Clause 9 amends section 19 of the Act by deleting reference to a "minor
infringement" and the restriction to notify the infringer by registered mail. This is to
facilitate other more efficient methods to be used, including electronic means.
Clause 20
2.20.1 Clause 20 amends section 30 of the Act to remove the restriction of service being only personal or registered mail and include other electronic methods or service. This will introduce efficient methods of electronic service and result in efficient cost saving mechanisms to benefit issuing authorities - and the agency tremendously, as well as ensuring expeditious service of documents to infringers, thereby enabling them to address their outstanding infringements speedily.
If fact, every occurrence of the phrase [by registered mail] is deleted from the Act.