Here are my observations regarding Black Templars. This isn't a rant, merely what I think the rules are saying. Tell me what you think:
1) The fluff says Black Templars don't have scouts, but in the actual rules there isn't any restriction that I've been able to find (unlike the expressly stated limitations against Librarians). Therefore the conclusion is that Black Templars could have both Crusader Squads with mixed Initiate/Neophyte ranks AND have a regular squad of scouts with sniper rifles.
2) Apparently, unless I'm missing something, the one and only way you can have a sword brethren in your army is if you choose the lone sword brethren as the sergeant of a Crusader Squad. I have to believe the intent is that sword brethren is just the BT name for what would be called honor guards or veterans in another SM army.
3) For the bulk of the vanilla troops in the codex, I have to believe the intent is that for any given army, the special rule "Chapter Tactics" should be explicitly replaced with "Chapter Tactics (chapter name)" when include in said army. For BT's, this means a vanilla tactical squad would be taken as having "Chapter Tactics (Black Templars)" and so would be affected by Helbrecht's "Crusade of Wrath" or Grimaldus' "Relics of Helsreach" special rules. If that is not the intent, this will make for some pretty schizophrenic armies, and I'm not just talking for the BT's (see "Captain Lysander" of the Imperial Fists).