This is the correct template for the final paper. To use any other template requires explicit prior permission and will only be granted for folks outside of School of Informatics and Computing.
Note that it is portrait. It is not landscape. Papers submitted in the ACM landscape template will be returned without a grade.
Edit: Note that Shaowen’s “Feminist HCI” paper and Shaowen and my “What is ‘Critical’ about Critical Design?” paper both use the required ACM format, so your paper should look like them!