BUTLER, Yanchep and Gingin residents can have their say in the same sex marriage postal survey if they are enrolled on the Commonwealth Electoral Roll.
They can also participate in the Australian Marriage Law Postal Survey if they made a legitimate application for enrolment by August 24 and are eligible to vote in a federal election as at August 24.
Participation in the Australian Bureau of Statistics survey is voluntary with the bureau asking those who choose not to complete the form to destroy it.
The bureau website said each eligible Australian was responsible for completing their own survey form.
The bureau said all residents should have received their survey package by Monday, September 25.
If you have not received a survey form by September 25 the bureau advised residents to contact them.
Friday, October 20 (6pm local time) will be the final day for requesting or picking up replacement survey forms, or for requesting a secure access code to access telephone and online response options.
To make sure your vote counts you need to mail your form back to the bureau by Friday, October 27.
The survey closes on Tuesday, 7 November 7 (6pm local time) – if your survey is received after this, it will not be counted.
On Wednesday, November 15 the result of the survey will be published on the bureau website.
The information line for the bureau is 1800 572 113 ( 8am to 8pm (local time), seven days a week).