Welcome back 'Lowcust',I'm far from being an expert on this...

Welcome back 'Lowcust',

I'm far from being an expert on this topic,you need to find out from a lawyer with expertise in corporate law to answer that one.I spoke to the ASX and ASIC and even they couldn't give me a definition,citing too many variables.
I had a look at this site:http://www.companydirectors.com.au/NR/rdonlyres/F798477E-13F4-4742-B85C-DBA2A6641328/0/100804_00229_ebook_Language_Directorship_v07_FINAL.pdf


and came up with only this:
1)
associated company
A company not controlled by the investor but over which the
investor has significant influence. Significant influence is
presumed to exist with ownership of between 20 per cent and
50 per cent of the voting share capital, but other evidence might
show otherwise.

2)
substantial shareholder
Owns at least five per cent of voting shares.

3)
takeover
Gaining control through the purchase of shares. Once a company
gains 20 per cent of shares in another company it must launch
a takeover bid. After launching a bid, the bidding company is
allowed to �creep� � increase its ownership � by buying up to
3 per cent per year.

If Areva take up their entitlement with the overall dilution they will end up with 50.532m shares =10.15% holding.(down from 10.57%)


However I wouldn't get too hung up about it as I accept John Young's response(they don't have a blocking stake).If they did they could have blocked this RI,it doesn't do them any favours just dilutes their holding and value.