(1) Where the Secretary of State receives more than one application for maintenance with respect to the same person with care and absent parent or non-resident parent, as the case may be, he shall, if no maintenance assessment under the former Act or maintenance calculation under the Act, as the case may be, has been made in relation to any of the applications, determine which application he shall proceed with in accordance with sub-paragraphs (2) to (11).
(2) Where an application by a person with care is made under section 4 of the former Act or of the Act ... and an application is made by an absent parent or non-resident parent under section 4 of the former Act or of the Act, as the case may be, the Secretary of State shall proceed with the application of the person with care.
(3) Where there is an assessment application by a qualifying child under section 7 of the former Act and a calculation application is made with respect to that child by a person who is, with respect to that child, a person with care or a non-resident parent, the Secretary of State shall proceed with the application of that person with care or non-resident parent, as the case may be.
(4) Where, in a case falling within sub-paragraph (3), there is made more than one subsequent application, the Secretary of State shall apply the provisions of sub-paragraphs (2), (7), (8) or (10), as appropriate in the circumstances of the case, to determine which application he shall proceed with.
(5) Where there is an assessment application and a calculation application by more than one qualifying child under section 7 of the former Act or of the Act, in relation to the same person with care and absent parent or non-resident parent, as the case may be, the Secretary of State shall proceed with the application of the elder or, as the case may be, eldest of the qualifying children.
(6) Where there is one absent parent and one non-resident parent in respect of the same qualifying child and an assessment application and a calculation application is received from each such person respectively, the Secretary of State shall proceed with both applications, treating them as a single application.
(7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(8) Where—
(a) a person with care makes an assessment application under section 4 of the former Act and a different person with care makes a calculation application under section 4 of the Act and those applications are in respect of the same qualifying child or qualifying children (whether or not any of those applications is also in respect of other qualifying children);
(b) each such person has parental responsibility for (or, in Scotland, parental rights over) that child or children; and
(c) under regulation 20 of the Child Support (Maintenance Assessments and Special Cases) Regulations 1992 (“the Maintenance Assessments and Special Cases Regulations ”) one of those persons is to be treated as an absent parent or under the provisions of regulation 8 of the Maintenance Calculations and Special Cases Regulations one of those persons is to be treated as a non-resident parent, as the case may be,
the Secretary of State shall proceed with the application of the person who does not fall to be treated as an absent parent under regulation 20 of the Maintenance Assessments and Special Cases Regulations , or as a non-resident parent under regulation 8 of the Maintenance Calculations and Special Cases Regulations , as the case may be.
(9) Where, in a case falling within sub-paragraph (8), there is more than one person who does not fall to be treated as an absent parent under regulation 20 of the Maintenance Assessments and Special Cases Regulations or as a non-resident parent under regulation 8 of the Maintenance Calculations and Special Cases Regulations , as the case may be, the Secretary of State shall apply the provisions of paragraph (10) to determine which application he shall proceed with.
(10) Where—
(a) a person with care makes an assessment application under section 4 of the former Act and a different person with care makes a calculation application under section 4 of the Act and those applications are in respect of the same qualifying child or qualifying children (whether or not any of those applications is also in respect of other qualifying children); and
(b) either—
(i) none of those persons has parental responsibility for (or, in Scotland, parental rights over) that child or children; or
(ii) the case falls within sub-paragraph (8)(b) but the Secretary of State has not been able to determine which application he is to proceed with under the provisions of sub-paragraph (8),
the Secretary of State shall proceed with the application of the principal provider of day to day care, as determined in accordance with sub-paragraph (11).
(11) For the purposes of sub-paragraph (10), the application of the principal provider is, where—
(a) the applications are in respect of one qualifying child, the application of that person with care to whom child benefit is paid in respect of that child;
(b) the applications are in respect of more than one qualifying child, the application of that person with care to whom child benefit is paid in respect of those children;
(c) the Secretary of State cannot determine which application he is to proceed with under head (a) or (b), the application of that applicant who in the opinion of the Secretary of State is the principal provider of day to day care for the child or children in question.
(12) Subject to sub-paragraph (13), where, in any case falling within sub-paragraphs (2) to (10), the applications are not in respect of identical qualifying children, the application that the Secretary of State is to proceed with as determined by those sub-paragraphs shall be treated as an application with respect to all of the qualifying children with respect to whom the applications were made.
(13) Where the Secretary of State is satisfied that the same person with care does not provide the principal day to day care for all of the qualifying children with respect to whom an application would but for the provisions of this paragraph be made under sub-paragraph (12), he shall make separate maintenance assessments under the former Act or maintenance calculations under the Act, as the case may be, in relation to each person with care providing such principal day to day care.
(14) For the purposes of this paragraph “day to day care” has the same meaning as in the Maintenance Assessments and Special Cases Regulations or the Maintenance Calculations and Special Cases Regulations , as the case may be.
(15) For the purposes of sub-paragraph (11), where a person has made an election under section 13A(1) of the Social Security Administration Act 1992 (election not to receive child benefit) for payments of child benefit not to be made in respect of a child, that person is to be treated as the person to whom child benefit is being paid in respect of that child.