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Migraine, epilepsy, asthma attacks, vertigo, flare-ups. The most under-used chapter in the Guide, and a diary is worth more than anything you say.
If you take one chapter away from this series, make it this one.
Chapter 15 is for conditions that come and go. Migraine. Epilepsy. Asthma attacks. Vertigo. Crohn's flares. Gout. Cluster headaches.
Every other chapter asks how you are most of the time. If you are fine between attacks, those chapters give you almost nothing — even if you lose 60 days a year.
Chapter 15 fixes that.
Three questions:
Severity and duration are combined into a letter code, A through J. Then the letter and the number of days a year meet in a table, and out comes your rating.
An attack lasting more than 24 hours counts as more than one affected day. So a two-day migraine is two days, not one attack.
The frequency bands are: 2+, 5+, 10+, 20+, 40+, 70+ and 100+ affected days a year.
Those thresholds are hard edges. Nineteen days a year and twenty days a year can be different ratings.
Some real examples from the table:
This is why the diary matters more than anything else you can do.
If your attacks fall into clearly different groups — say, minor migraines twice a week and severe ones once a month — they are grouped separately and each group gets its own rating.
Do not average them yourself. Record them as two different things.
Step 10. There is a rating for what you give up between attacks to avoid triggering one.
That is a separate score. Ask for it.
The Guide says that unless the intermittent nature clearly overwhelms the system-specific effects, or the other way round, both methods should be used and the higher taken.
So an asthma claim should be looked at under Chapter 1 and Chapter 15. A migraine claim under Chapter 5 and Chapter 15. If only one was done, that is a fair question to ask.
A day the attack takes from you. If it lasts two days, that is two affected days.
Rate what actually happens now. But the avoidance rating and the underlying condition are still assessed.
It is the single most valuable document you can bring to an assessment for an intermittent condition. Twelve months of dates beats any description.
Chapter 16: activities of daily living.
If you have a permanent impairment assessment coming up, we do these every week. Call 0429 146 039 or email reception@vhc.org.au.
What is the GARP? · The chapter map · DVA Claims: PI points calculator · Permanent Impairment Assessments · DVA claims · SoP library
This is general information for Australian veterans. It is not legal advice. It explains Chapter 15 of the Guide to Determining Impairment and Compensation 2026 (F2026L00595), which started on 1 July 2026. The full rules are on the Federal Register of Legislation. Check your own situation with DVA on 1800 VETERAN (1800 838 372).
The expert in veterans’ medicolegal medicine — Expert DVA Doctor.








Dr Thomas Perkins is the founding doctor at the Veterans Health Centre in Ipswich, Queensland, and the leading expert in veterans’ medicolegal work in Australia. He has spent over 13 years working exclusively with current and former Australian Defence Force members — treating conditions, writing reports, and navigating the DVA system alongside them.
With 100,000+ DVA claims submitted and over 2,000 Permanent Impairment Assessments completed, Dr Perkins brings a depth of experience that simply cannot be replicated from a textbook. He understands the Statements of Principles, the GARP tables, the imaging that proves what a physical examination alone cannot — and the difference that a properly written report makes at every level, from initial liability through to the VRB.
Every chart review, every diagnostic assessment, and every impairment rating is personally overseen by Dr Perkins. If you’re looking for a doctor who knows veterans medicine inside and out, you’ve found the right clinic.
Contact us0429 146 039 reception@vhc.org.au
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