My paper is already in the review process. Do I need to pay an APC if it is accepted?

Manuscripts that are already in the submission system will not be charged an APC. Any submissions received after 15 August will be charged an APC if the paper is ultimately accepted. Any revised papers that are submitted after 15 August will not be charged an APC if the original submission was made before 15 August. Manuscripts that have received a ”reject, but invite to resubmit” are considered as new submissions and will be charged an APC if submitted after 15 August.