This section applies if—
an authority designated under section 52M above informs the Welsh Ministers by notice in writing under subsection (8)(b) of that section, or
an authority designated under section 52P above informs the Welsh Ministers by notice in writing under subsection (8)(b) of that section.
As soon as is reasonably practicable after they receive the notice the Welsh Ministers shall serve on the authority a notice stating the amount which the amount calculated by it as its budget requirement for the year is not to exceed; and the amount stated shall be that stated in the notice under section 52M(4)(b) or 52P(4)(b) above (as the case may be).
When they serve a notice under subsection (2) above on a precepting authority the Welsh Ministers shall also serve a copy of it on each billing authority to which the precepting authority has power to issue a precept.