Docs feedback: "Enable a specific runner for a specific project" section of page "The scope of runners" is not clear enough

Section https://docs.gitlab.com/ee/ci/runners/runners_scope.html#enable-a-specific-runner-for-a-specific-project mentions this:

A specific runner is available in the project it was created for. An administrator can enable a specific runner to apply to additional projects.

• You must have the Owner role for the project.
• The specific runner must not be locked.

• "an administrator" is unclear, as far as I could test this feature is not limited to users with Administrator role on the GitLab instance
• "You must have the Owner role for the project.": it's not clear for which project! the one where the runner is already configured, or the one where you are trying to configure the existing runner ?

From what I could test and read on gitlab-runner#1322 (comment 11922962), you need to be Master (or Owner) on the project where the runner is already configured in order to enable it in another project for which you are also Master (or Owner`).