The home end WAS on general sale but is now back to restricted. I expect it has to be (police orders?) where the away end is sold out.
Certainly the Charlton website says there will be no more online sales and that anyone who buys in person or on the phone has to be a ST holder or Red Card...
It's definitely 3,000 or 10% if capacity is less than 30k in PL.
This is the current Premier League rulebook:
http://www.premierleague.com/content/dam/premierleague/site-content/News/publications/handbooks/premier-league-handbook-2015-16.pdf
It's Rule R.8 on page 177 (of the document, 184 of...
Have seen a lot of posters criticising as 'small' the allocation of 3,000-ish away tickets that Charlton have given you.
Whilst I appreciate you could take far more, a couple of quick points:
1. Bournemouth on the last day of last season is the ONLY time an away team has ever been given more...