Instruction outwith a FTO RTF

[mr_flydive]

Can anyone clarify the type of instruction outside a FTO or RTF that an FI instructor can do.

I will assume that ab-inito ppl's are out but
? Continuity training
IMC training
Tail dragger training

and if the instructor has a cpl can you charge.

What about on an individuals private A/C
What about in a group A/C which you may or nor be a member of.

Thanks