While overseas you can still ensure that you fulfill your responsibility and duty to vote.
For guidance, here is some first hand experience from a mother of an overseas Caymanian student:
As my son is at school in the UK, and he had a limited time to register, I contacted Mr Wesley Howell, Cayman’s Elections Supervisor (a man who couldn’t be better suited to the job – fair, responsive and authoritative), to find out if my son could register in advance of his birthday. Mr Howell confirmed that my son was allowed to get onto the October list (as his birthday is in November) in advance of the elections. He will be legally 18 at the time of the elections.
The registration process was very easy, and can be found here: https://portal.elections.ky/index.php/home/registeration-process
We simply had to turn up to the elections office with a completed Form 4 (Cayman Islands Election Law - 2017 revision) and the following original documents: Birth Certificate; Status Certificate or birth certificate of parent or grandparent showing they were born in Cayman, and finally an ID (passport or driving license).
The process is as follows – applications are submitted on a quarterly basis (1 Ocober being the last deadline for the current round). There is then a three month “cooling off” period. The voters list from 1 October will come into force on 1 January 2021. After this time, my son will be able to go to the elections office, have his photograph taken and receive his voter registration card. He will officially be on the electoral roll and able to vote.
If you have missed the 1 October deadline, the next and final opportunity to register in time for the May 2021 General Election is 4 January. So, get out and get counted!