Size criteria and supported exempt accommodation

HB/CTB Circular A4/2012 (para 50) says that the size criteria rules will not apply to those in supported ‘exempt’ accommodation but I can’t find any mention of this in the Housing Benefit (Amendment) Regulations 2012.

Am I missing something?

HB (Amendment) regs

5(7),(2) This regulation does not apply—

(a)in a rent allowance case where the tenancy is an excluded tenancy of a type mentioned in any of paragraphs 4 to 11 of Schedule 2 (excluded tenancies) and the landlord is not a registered housing association; .

(b)in respect of shared ownership tenancies; .

(c)in respect of mooring charges for houseboats and payments in respect of the site on which a caravan or mobile home stands; .

(d)where the claimant or the claimant’s partner has attained the qualifying age for state pension credit, or where both have attained that age; or .

(e)where the dwelling is temporary accommodation.

Sorry, still being a bit clueless - which of those exceptions (a-e) specifically means supported ‘exempt’ accommodation?

Thanks :-)