Part 2Civil partnership: England and Wales
Chapter 1Registration
Formation, eligibility and parental etc. consent
3Eligibility
(1)
Two people are not eligible to register as civil partners of each other if—
(a)
they are not of the same sex,
(b)
either of them is already a civil partner or lawfully married,
(c)
either of them is under 16, or
(d)
they are within prohibited degrees of relationship.
(2)
Part 1 of Schedule 1 contains provisions for determining when two people are within prohibited degrees of relationship.