FRS9 Joint venture with different year end date

Hi

I'm working with an incorporated charity (IC) who is a member of another company limited by guarentee(CLG) .  The CLG has a total of 3 members all with one vote. so there is 33.33% control to each member.

the IC has a year end of 30th June.  the CLG has a year end of 31st March.

How do I apply the equity method of FRS9 in the IC accounts? - Do I take the 12 months accounting period results of the CLG in the consolidation of the IC or the 12 months period of the IC (i.e 9 months of last years CLG & 3 months of this years CLG numbers)

Does FRS9 even apply when it's a CLG - as it only seems to refer to shareholding/investment as the mechanism of determining control? - which in this case is null as there are no shares.

Help!

thanks