AA/PIP and Pension credit

I was trying to find more about matter of SDP addition to PC in a situation og joint tenancy .
I found the following but it is about ESA
Chapter 44
44001 This Chapter explains how to calculate the normal amount payable for ESA
People who are not non-dependants
44139 People who normally reside with the claimant and are not non-dependants1 are
1. any person aged under 18
2.



7. a person or their partner who is not a close relative, except where 8. Applies who jointly occupies the claimant’s dwelling and who is
7.1 a co-owner of the dwelling with the claimant or partner or
7.2 jointly liable with the claimant or partner to make payments to the same landlord for the occupation of the dwelling

8. a close relative who satisfies 7. And the
8.1 claimant or partners co-ownership or joint liability arose
8.1.a before 11.4.88

or Vol 8 Amendment 14 February 2014

8.1.b if later, on or before the date on which the claimant or partner first occupied the dwelling3 or
9.
My question is if thisapplies to PC as well? ,
"co-ownership or joint liability arose
8.1.a before 11.4.88 8.1.b if later, on or before the date on which the claimant or partner first occupied the dwelling3 or 9. "

What is11.4.88 ? is it year 1988 ?

Are there any other rules (when living with others) for PC - SDP .
Please help

Regards
zaib