23.—In deciding whether—

(a) to include in an order under section 12 a provision requiring the making of periodical payments for the benefit of a dependent member of the family,

(b) to make an order under paragraph (a) (ii), (b) (ii) or (c) (ii) of section 13 (1),

(c) to make an order under section 22 varying, discharging or suspending a provision referred to in paragraph (a) or an order referred to in paragraph (b),

the court shall not have regard to conduct by the spouse or spouses concerned of the kind specified in subsection (2) (i) of section 20.