A direction under section 78(1) (a "principal direction") may make provision with respect to—
The Secretary of State may in particular (either in a principal direction or in any subsequent direction) make provision—
of the amount of any payments which need to be made by one body to another for the purposes of the effective operation of the specified arrangements, and for the variation of any such determination,
The Secretary of State may, when giving a principal direction to any bodies to which section 78 applies, give such directions to any other such body as he considers appropriate for or in connection with securing that full effect is given to the principal direction.
Before giving a principal direction to any bodies to which section 78 applies, the Secretary of State may—
as he considers appropriate with a view to enabling him to determine whether the principal direction should be given.
The revocation of a principal direction does not affect the continued operation of the specified arrangements.
"The specified arrangements", in relation to a principal direction, means the arrangements specified in the direction in pursuance of section 78(1).