Income Tax (Earnings and Pensions) Act 2003139
In section 61 (interpretation), after subsection (4) insert —
5
For the purposes of this Chapter two people of the same sex living together as if they were civil partners of each other are treated as if they were civil partners of each other.
For the purposes of this Chapter, two people of the same sex are to be regarded as living together as if they were civil partners if, but only if, they would be regarded as living together as husband and wife were they instead two people of the opposite sex.