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Some allowances will only apply in certain circumstances - ie. a particular person needs a travel allowance which wouldn't normally apply, or they need to arrange their own accommodation for a shift, etc.
Step 1;
First, there needs to be at least one allowance setup which can be manually added;
These are typically ones which apply only on an ah-hoc basis.
Step 2;
These would be applied by the admin team/rostering staff by editing the roster assignment, (ie. by clicking on their name on the roster for an event, then clicking 'Edit' at the top-right of the popup box, and click 'Add' in the allowances section which is shown in the popup window;
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