The Chairperson of SPR has recently clarified that the constitutional amendments on Undi 18 has yet to be gazetted and as such the existing rules on new voter registration still applies. Only those 21 years and above can register as a new voter through any of the allowable methods including the online one. Additionally the anticipated automatic voter registration process implementation is estimated to take between 18- 24 months for implementation.
You may read his statement here SPR Penjelasan Berkaitan #UNDI 18. Hence whether or not 18 year old can vote in the coming Sarawak state elections (PRN12) is not yet known at this stage. What we do advise is that those who are currently 21 and above to register as voter NOW in order that they will be able to vote when the time comes.