Conditions for <single-issue-view>

We have implemented a few custom single-issue-views (for exporting single issues) and search-request-views (for exporting searches).

Access to these functions are controlled via a condition, which is implemented for the search-request-view similar to this:

This works for the search exports, but does not affect the single-issue-view.
Does anyone know a way of implementing a condition for the single-issue-view?