Graduating student and confusion over council tax bill

Spendless

CIS said:

How it should work is that (by way of example);

A, B and C are joint tenants. B and C are students.

a) Determine all joint tenants  - A, B and C

b) Apply s6(2) LGFA 1992 to determine liability - all are joint tenants so A,B and C are initially jointly liable.

c) Apply s6(3) LGFA 1992 in respect of students - remove all full time students from joint liability (B and C). This leaves just A

d) Make A liable and apply any discounts

Thank you. What it sounds like is my council explaining things to my friend left out step C. 
Fingers crossed that the council where DS studies is better clued up.

Spendless

Housemate 1 got paid for the work they've done, so they have paid the monthly council tax bill. 
We are seeing them next week, so will talk to them about options of Housemate 1 claiming CT benefit and what their longer term plans are if Housemate1 still wants to houseshare next year (my suggestion will be to ensure they're in a house that is council band A) 
Thanks for all the help.