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Regulations under section 89(5) above may include provision that—
If the Secretary of State directs it to do so, a billing authority shall transfer from its collection fund to its general fund . . . such an amount as is specified in, or calculated in a manner specified in, the direction; and the transfer shall be made at such time as is specified in the direction.
If the Secretary of State directs it to do so, a billing authority shall transfer to its collection fund from its general fund . . . such an amount as is specified in, or calculated in a manner specified in, the direction; and the transfer shall be made at such time as is specified in the direction.
Different directions may be given to different authorities under subsection (4) or (5) above.