Per RAW, with the 7th Edition Update to Clan Raukaan (eVersion) being the latest release of the rules, Clan Raukaan is a legal supplement to Codex; Space Marines, but Codex; Space Marines uses the most recent version of the rules.
Now, a techmarine is stated to be a HQ as its battlefield role. Each Battlefield Role has a number of slots with which you can take a number of those battlefield roles.
"For each HQ choice in a Clan Raukaan Detachment (not including other techmarines, servitors, Command Squads or Honour Guard) you may include up to two techmarines. [Master of the Forge omitted as no longer available unit type] These selections do not use up a Force Organisation Slot."
ref; Clan Raukaan .mobi
"Formations are a special type of detachment. [explanation of formations] Instead of including a Force Organisation Chart, the Army List entries that comprise a formation are listed on it, along with any special rules those units gain. Unless stated otherwise, each individual unit maintains its normal battlefield role when taken as part of a formation."
So;
It's a Detachment, using the Clan Raukaan rules. If a HQ is an available option for that Detachment, you may include two techmarines.
However, a Detachment requires specific units, and list which units those are, and most importantly lists "any special rule those units gain".
So, only those units which are listed as being part of the formation gain any special rules from it, and it only counts as a formation provided you have the units within it.
Per rules parsing, it can be read one of two ways;
You're not a detachment unless you meet exactly what's required, no more, no less.
Those additional units may be included, but don't recieve any special rules benefits from the detachment, as they are not actually listed as "those units" in the detachment.
I'm leaning towards the latter, personally.
Now, a techmarine is stated to be a HQ as its battlefield role. Each Battlefield Role has a number of slots with which you can take a number of those battlefield roles.
"For each HQ choice in a Clan Raukaan Detachment (not including other techmarines, servitors, Command Squads or Honour Guard) you may include up to two techmarines. [Master of the Forge omitted as no longer available unit type] These selections do not use up a Force Organisation Slot."
ref; Clan Raukaan .mobi
"Formations are a special type of detachment. [explanation of formations] Instead of including a Force Organisation Chart, the Army List entries that comprise a formation are listed on it, along with any special rules those units gain. Unless stated otherwise, each individual unit maintains its normal battlefield role when taken as part of a formation."
So;
It's a Detachment, using the Clan Raukaan rules. If a HQ is an available option for that Detachment, you may include two techmarines.
However, a Detachment requires specific units, and list which units those are, and most importantly lists "any special rule those units gain".
So, only those units which are listed as being part of the formation gain any special rules from it, and it only counts as a formation provided you have the units within it.
Per rules parsing, it can be read one of two ways;
You're not a detachment unless you meet exactly what's required, no more, no less.
Those additional units may be included, but don't recieve any special rules benefits from the detachment, as they are not actually listed as "those units" in the detachment.
I'm leaning towards the latter, personally.
