22. Variation, etc., of certain orders under this Part.
(1) This section applies to the following orders:
(a) a maintenance pending suit order,
(b) a periodical payments order,
(c) a secured periodical payments order,
(d) a lump sum order if and in so far as it provides for the payment of the lump sum concerned by instalments or requires the payment of any such instalments to be secured,
(e) an order under paragraph (b), (c) or (d) of section 14(1) in so far as such application is not restricted or excluded pursuant to section 14(2),
(f) an order under subparagraph (i) or (ii) of section 15(1)(a),