“(1)

This section applies where a child support officer—

(a)

is required to make a maintenance assessment;

(b)

is proposing to conduct a review under section 16, 17, 18 or 19; or

(c)

is conducting such a review.

(1A)

If it appears to the child support officer that he does not have sufficient information to enable him—

(a)

in a case falling within subsection (1)(a), to make the assessment,

(b)

in a case falling within subsection (1)(b), to conduct the proposed review, or

(c)

in a case falling within subsection (1)(c), to complete the review,

he may make an interim maintenance assessment.”