What about this?
From
www.welfare.ie re Illness Benefit:
"Rule 5
Do not do any work, unless it is work that you are allowed to do under our regulations. The type of work allowed is:
work for which you do not get paid,
or
work you do as part of treatment while you are a patient in hospital or a similar place,
or
work you do as an out-worker under a charitable scheme, as long as your weekly earnings are under a certain limit.
You must first get permission from us before doing work of any kind.
If you do not obey these rules of behaviour, you could lose your Illness Benefit.
Exemption from Rule 5
In certain cases, you may be exempt from Rule 5 of the Rules of Behaviour, but only for appropriate rehabilitative work.
The exemption may allow you to take part in:
paid employment for rehabilitation (for a maximum of 20 hours work per week),
or
an approved training course (for example a FÁS training course), if you are no longer capable of following your usual occupation and need to re-train for more suitable work.
Before starting work or training of any kind you must first get permission in writing from us."