(1)For the purposes of this Act and without prejudice to its provisions relating to discrimination occurring in particular circumstances discrimination shall be taken to occur where -

(a) a person is treated less favourably than another person is, has been or would be treated in a comparable situation on any of the grounds specified in subsection (2) (in this Act referred to as the 'discriminatory grounds') which -

(i) exists,

(ii) existed but no longer exists,

(iii) may exist in the future, or

(iv) is imputed to the person concerned,

(b) a person who is associated with another person -

(i) is treated, by virtue of that association, less favourably than a person who is not so associated is, has been or would be treated in a comparable situation, and

(ii) similar treatment of that other person on any of the discriminatory grounds would, by virtue of paragraph (a), constitute discrimination.

(2) As between any 2 persons, the discriminatory grounds (and the descriptions of those grounds for the purposes of this Act) are -

(a) that one is a woman and the other is a man (in this Act referred to as "the gender ground"),