It is because that is what this clause is all about. It concerns situations where it is believed that affordable housing is causing the block. Every other aspect of Section 106 can be negotiated voluntarily. Under Section 106 in its totality consideration can be given to other aspects, but it is only where affordable housing is the only aspect that is said to be causing the lack of viability that this clause will impinge.
Growth and Infrastructure Bill
Proceeding contribution from
Baroness Hanham
(Conservative)
in the House of Lords on Monday, 28 January 2013.
It occurred during Committee of the Whole House (HL)
and
Debate on bills on Growth and Infrastructure Bill.
Type
Proceeding contribution
Reference
742 c1383 
Session
2012-13
Chamber / Committee
House of Lords chamber
Subjects
Librarians' tools
Timestamp
2013-11-19 11:04:17 +0000
URI
http://hansard.intranet.data.parliament.uk/Lords/2013-01-28/13012842000006
In Indexing
http://indexing.parliament.uk/Content/Edit/1?uri=http://hansard.intranet.data.parliament.uk/Lords/2013-01-28/13012842000006
In Solr
https://search.parliament.uk/claw/solr/?id=http://hansard.intranet.data.parliament.uk/Lords/2013-01-28/13012842000006